Bigger on the Inside
Top: Outside. Bottom: Inside.

Third Doctor: Well, Sergeant? Aren't you going to say "It's bigger on the inside than it is on the outside"? Everybody else does.
Sgt. Benton: Well, it's... pretty obvious, isn't it?

Technically referred to as dimensional transcendence, an unusual fact of some architecture in fiction is that no matter how small it is on the outside, on the inside it can be any size it darned well pleases. All you have to do is simply walk into an ordinary 1960s London police call box and you're in a space that dwarfs most Gothic cathedrals.

This might be a sight gag, but equally it may be done for technical reasons, such as in early Video Games, where fixed-size background tiles may cause furnished interiors to become larger than the plain exterior suggests.

There may or may not be an in-universe explanation, typically involving some sort of Pocket Dimension relativisation of space-time, Applied Phlebotinum or simply magic.

Often, however, this is simply due to studio-budgeting, where the exterior establishing shot is simply a transition to the indoor-scene, and they will save money by having a smaller set of the exterior (or a shot of a small building to better visualize the location of the indoor space, etc).

Being bigger on the inside is not just limited to architecture such as buildings and other physical structures. Within media it can also apply to living creatures with incredibly spacious internal anatomy that characters who enter it eventually discover. Usually if terrestrial in origin, and not otherworldly or supernatural, then Artistic License – Biology has been employed. If extraterrestrial, then it's simply a case of Bizarre Alien Biology at work.

Closely related to Units Not to Scale, almost every game that has ever let you enter a building displays it being bigger on the inside. Controller and engine limitations require that building internals in the vast majority of games need to be scaled up to ludicrous proportions in order to make the game playable. Buildings that look about correct scale on the outside normally have to be three or four times larger on the inside. Among many developers this is a level design principle known as 'keep it wide'.

Compare with Clown Car, a common sight gag, and Clown Car Base, which is when we never see the inside. Also compare Perspective Magic. Contrast Misleading Package Size. Often overlaps with Alien Geometries. A subtrope is Oh Look, More Rooms!, in which rooms keep opening up further and further in, rather than blowing you away with a giant hall on first glance. See also Hammerspace and Bag of Holding for the variant where there is more storage on the inside. The ultimate version is likely to be the Door in the Middle of Nowhere that unexplainably leads somewhere when opened. This strange piece of furniture is covered by The Lonely Door trope.

Curiously, it is exceedingly rare to invert this trope's literal phrasing, and exclaim "It's smaller on the outside!" You'd have thought it would take less than 49 years for this inversion to be applied to the TARDIS, but you'd be wrong. On the other hand, the usual phrase is the natural wording when you see the outside first, which people generally do. When you then see the inside, you comment on what you're looking at at the moment. If you saw the inside first and then stepped outside, "It's smaller on the outside!" would be more natural.


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    Doctor Who 
That's right, the TARDIS is so much bigger on the inside that it needed a folder to itself.

  • The TARDISnote , "up-and-downy stuff in a big blue box" from Doctor Who, is the Trope Codifier. It is such a recognisable example of this trope that the word "Tardis" can actually be found in the dictionary, defined as 'something which appears to be much larger on the inside than on the outside'. Oh, and it's not just bigger, it's a whole lot bigger. The control room you see and that companions marvel at is just a small part. It has its own library, tennis court, swimming pool, hell, it has an entire STAR held in suspended animation as a fuel source!
  • In "The Wheel in Space", the Doctor removes the component that allows the TARDIS to be dimensionally transcendental, so the inside reverts to a simple police box interior.
  • The most thorough demonstration of just how big the TARDIS truly is dates back to the Fourth Doctor serial "The Invasion of Time", in which the last (half-hour) episode is spent almost entirely navigating the labyrinthine halls and corridors of the TARDIS. It's seen to contain indoor gardens, at least one swimming pool, an art gallery, and dozens of utility rooms and corridors.
  • The interior of the TARDIS is a great deal bigger than a mall — in the NA Blood Heat she actually materialises around an entire planet! On TV, it has never been indicated how big she is; at times it's implied she is finite in size, but really immense, while other times it's been implied that her interior is infinite in size. The closest example we've seen was in "The Name of the Doctor", in which the Doctor reveals that the massive TARDIS-shaped monument serving as his tomb is actually the corpse of the TARDIS. It turns out that dimensional leaking is common when TARDISes die, the outer shell expanding to reflect some of the enormous dimensions held within.
  • During "Father's Day", the first clue the Ninth Doctor gets that something has gone horribly wrong is that the TARDIS is not bigger on the inside; its interior is that of the prop police call box, as it was for part of "The Wheel in Space". Then the Reapers show up...
  • At the end of "The Doctor Dances", when Capt. Jack Harkness makes the remark, the Ninth Doctor turns it into a Double Entendre by responding, "You'd better be."
  • The doctor's dressing room, in which we see the tenth Doctor choose his new attire, resembles a very roomy clothes shop, covering a couple of floors of the Tardis.
  • Also used to dramatic effect in the episode "Doomsday": The Daleks mention that the Genesis Ark will establish their supremacy because of "Time Lord science". The Doctor wonders what that means, and near the climax, it's revealed that the Daleks meant this aspect of Time Lord science — the ark, though tiny, contains millions of Daleks.
  • In the Big Finish audioplay "The Condemned", they play around a little with the companion's reaction to the interior of the TARDIS. Charley Pollard, who has traveled for some time with the Eighth Doctor, encounters his sixth incarnation. On entering the TARDIS, she comments how it's much smaller than she expected (compared to the huge, gothic cathedral look it has by the time of the Eighth Doctor). The Sixth Doctor is quite put out by this.
  • The UNIT command trailer in the new series, first seen in "The Sontaran Stratagem", is definitely bigger inside than out, and unlike with the TARDIS there is no in-show handwave. (Though maybe UNIT just copied the Doctor's tech.) Curiously, the set is actually bigger but this is only by a few feet; in the DVD extras, it is remarked that it nonetheless seems vastly larger on camera.
  • Used as a Dark Reprise in the episode "The Waters of Mars". The Doctor... has gone a little crazy, and decides instead of following the rules of time will force the rules to obey him. So He saves three people who were supposed to die. After being saved, one of them runs out of the TARDIS and absolutely terrified exclaims "It's bigger on the inside!" She then turns the Doctor asks "What the hell are you?" before running away.
  • Eleven's TARDIS, according to Matt Smith, is apparently "bigger on the inside more than bigger on the inside previously". Furthermore, when he jettisons off rooms for fuel, he says goodbye to the swimming pool, the scullery, and Squash Court 7. The fact that there are seven squash courts — combined with the fact that it is supposed to be able to comfortably contain the egos of six Time Lord pilots simultaneously — implies that the TARDIS ranks in size somewhere between university campus and small neighborhood. Later, in "The Girl Who Waited", he mentioned that he might have to jettison the karaoke bar. That's right, the Doctor has a karaoke bar!
  • The episode "The Doctor's Wife" lets us see more of the TARDIS for the first time in Revived Series, but that's not why its so notable for this particular trope. The TARDIS, upon taking a human body, feels that humans — and the Doctor — are bigger on the inside, and she's able to overcome the force which has taken control of her Police Box self because he's so much smaller on the inside. It's a wonderful twist which shows this trope might not just be about space.
  • According to "Journey to the Center of the TARDIS", the inside of a TARDIS has no limit to its dimensions. Whether or not the Doctor was exaggerating at the time is up for debate. We also see much more of the interior than the usual few hallways, and you really get the idea of just what it's like in there. You could spend days and never see the same thing twice, each room more wondrous than the last. But you wouldn't, 'cause it's an Eldritch Location that can be as scary as all hell, especially if you make the mistake of pissing off the TARDIS, as the salvagers very quickly realise. Perhaps the most-accurate thing one can say about the TARDIS is that the main thing that limits her interior dimensions is the Doctor. Regardless of whether its size is truly infinite, at the very least it can safely encapsulate an entire star, which it uses as a power source. The star that exists inside the TARDIS is frozen in time at the instant it becomes a black hole. This means it must be a MASSIVE star, far larger than our sun. The absolute minimum size a star must be to form a black hole is 3 times the size of our sun (but they are typically much larger than that). This also has the side effect of making the TARDIS a Dyson Sphere. That little police box is actually a Dyson Sphere on the inside. Puts a little bit of perspective into how powerful a TARDIS is doesn't it?
  • The third tie-in Adventure Game, "TARDIS", has the Doctor send Amy to retrieve some items from his private study, which he mentions is about a mile or two away from the control room.
  • Taken to more extremes in "Flatline". The outside has shrunk, with the inside staying mostly the same. It fits comfortably in Clara's handbag later on in the episode. And the Doctor mentions that he needs to play tricks with gravity to prevent the TARDIS's weight from cracking the surface of the planet every time it lands. Lampshaded by the Doctor. Rigsy (seeing the now-tiny TARDIS for the first time, and the Doctor inside), exclaims "it's bigger on the inside!" The Doctor states "I don't think that statement has ever been more true."
  • In the episode "Last Christmas", invoked by Santa. When someone asks how he can possibly fit presents for the entire world in his sleigh, he enthusiastically says "it's bigger on the inside!"
  • The page quote from "The Three Doctors" is actually a lampshading of the phrase those who see the TARDIS for the first time usually exclaim, which gives us our page title: "It's bigger on the inside!" This was being mocked as early as the Third Doctor, although Benton thought it was just too obvious to be worth pointing out.
    • Ten, to Martha in "Smith and Jones": "Is it? I never noticed!"
    • Ten pre-empts this with Wilf, but Wilf (having never been in the TARDIS but still being used to weird stuff) just replies, "I was expecting it to be cleaner..."
    • After first properly encountering the TARDIS in "The Vampires of Venice", Rory immediately deduces the inside is in another dimension, disappointing Eleven: "I like the bit when someone says 'It's bigger on the inside!' I always look forward to that."
    • In "The Snowmen", Clara ducks out and walks all the way around the police box, then comes back in and proclaims: "It's smaller on the outside!" This is how Eleven knows she's something special.
    • In "Into The Dalek", The Doctor lands the Tardis right over a pilot, Journey Blue, whose ship is about to explode, causing her to materialize right inside the ship, and thus she sees the inside first, so when she sees that on the outside it's just a phone box, Journey Blue remarks just like Clara that it's "smaller on the outside". The Doctor remarks it's more impressive when you see it the other way around like most do.
    • Hilariously (over)done in "The Husbands of River Song": River is stealing the TARDIS with the Doctor as her companion, since she doesn't recognize his new face (Twelve). She warns him that the inside of the TARDIS is "a bit surprising." He just smirks and says "Finally... it's my go," and gives a truly epic speech.
      Doctor:! It's bigger!
      River: Well, yes.
      Doctor: On the inside!
      River: We need to concentrate.
      Doctor: Than it is!
      River: I know where you're going with this, but I need you to calm down.
      Doctor: On the outside!
      River: You've certainly grasped the essentials.
      Doctor: My entire understanding of physical space has been transformed! Three-dimensional Euclidean geometry has been torn up, thrown in the air and snogged to death! My grasp of the universal constants of physical reality has been changed... forever. [beat] Sorry. I've always wanted to see that done properly.
  • The recurring Expanded Universe character Iris Wildthyme is an in-universe parody of the Doctor, and as such, her TARDIS is "smaller on the inside".
  • The Slitheen, introduced in "Aliens of London", are bigger than the humans they disguise themselves as, thanks to some form of compression technology. In The Sarah Jane Adventures, they've upgraded to even skinnier models. This technology was seen twice before in the Classic Series, first in "City of Death" when Scarlioni removes his human mask to reveal the alien Scaroth, whose head is bigger than Scarlioni's (since the Scaroth mask had to fit over Julian Glover's head), and again in "The Leisure Hive" when Brock's human mask is removed to reveal he is really a Foamasi, whose heads are ridiculously bigger than human heads! In both cases, characters were shocked to see the alien under the mask, but don't seem to notice that the heads are bigger than the masks, so they really Failed a Spot Check. There wasn't even an in-show handwave!
  • In the Doctor Who Eighth Doctor Adventures novels, the villain, Sabbath, turns up wearing a suit which is bigger on the inside. It functions surprisingly well as a disguise, proving that although he's maybe twice the Doctor's size, he also just might have twice the Doctor's brainpower. Not only is it slimming, it allows him to unexpectedly pull out a gun.
  • In "The Runaway Bride," it's revealed that the Doctor's pockets are also "bigger on the inside."
  • It's revealed in "The Day of the Doctor" that Gallifreyan artwork makes use of this trope. The painting "No More" / "Gallifrey Falls", which is a few feet across on the outside but big enough to contain the city of Arcadia on the inside, is a key factor in the story.
  • An Adventure in Space and Time, a docudrama about the filming of the First Doctor's episodes, features a Mythology Gag with Waris Hussein half-jokingly lamenting that the run-down, shabby set on which they're forced to film the TARDIS scenes is "smaller on the inside."
  • Subverted at first in "Engines of War". The TARDIS is on its side, and the Doctor ushers Cinder in, and he expects her to say this but instead she remarks everything is "The right way up" (despite being on its side), it takes a bit for her to get to the size issue.
  • Subverted in "The Visitation": the Terileptil ship proves bigger than it looks from the outside — because the crash impact caused it to partially bury itself in the ground.
  • In "Mawdryn Undead", the teleport capsule is bigger on the inside — a first clue that Mawdryn's people have knowledge of Time Lord technology.

    Anime and Manga 
  • The heroes of JoJo's Bizarre Adventure Part 5 use a turtle. Yes, a turtle. Its Stand ability, Mr. President, allows people to enter a separate space within its shell. It's got a fridge and a bathroom in there, too, something which the characters comment on.
  • Mahou Sensei Negima!
    • Kaede has one of these inside her Invisibility Cloak. You put it over your head, it collapses onto the ground and vanishes, and you find yourself in a comfortably large house.
    • The same holds true for Evangeline's Resort.
    • As are the Gateports in Mundus Magicus.
  • Somewhat parodied in Ouran High School Host Club, when they went over to Haruhi's house, or at least the dream before it. Haruhi in the dream was about to open a closet, and Tamaki tried to cheer up the rest of the group, and probably himself, by saying "Inside that closet must be an infinite space"
  • Tenchi Muyo!
    • Washuu's laboratory. It's accessed through a doorway under the stairs at Tenchi's house, but Word of God says the laboratory covers five planets.
    • Jurai's treeships generate pocket dimensions as living space for their crew. Which tend to include vast forests.
    • In the TV-series, Tenchi Universe, she gives the bathroom the same treatment. Apparently, they decided that the floating, bubbled, hot-springs island from the OVAnote  was a tad too showy.
  • Lala of To Love-Ru seems to be able to do this, turning a closet into a mid-sized lab, expanding an already existing room to 5 times normal, while someone was in it, and later building a three bedroom flat on top of the main character's house.
  • Ah! My Goddess' Skuld created one of these to provide extra storage space for some of the motorcycle club's gear. Unfortunately, the control got accidentally reset — stranding Keiichi and Belldandy in the center of an infinitely large room. And Bell was temporarily without her powers... Keiichi finally realized the crawlspace under the building wasn't within the field, so they pulled up a portion of the floor and crawled out. Of particular interest is how it's expanded: it connects "borrowed" time-slices of the room from the future to the present room. How much time does a slice amount to is not explained, but Skuld does say that it will run out of batteries in less than a week's time; if the time slices were able to almost quadruple the room's size in less than a day's use, a week's time would round on the logarithmic.
  • Gluttony's stomach in Fullmetal Alchemist. It Makes Sense in Context. Father wanted to make a quick and cheap access to the Gate of Truth... And created a more or less bottomless Pocket Dimension instead.
  • The peach sennin's table-top garden box in InuYasha, where all his "disciples" live and work. Also Yourei-Taisei's home is both a small shack under a bridge and a massive paradise. And of course, there's Naraku, who was bleeding gigantic voids after he first absorbed Moryoumaru and whose body was the second to last battleground. The actual last battleground also counts, as it was the inside of the Shikon no Tama itself.
  • There was an arc in Ghost Hunt where the main characters were investigating a labyrinth-like mansion that seemed to be much smaller on the inside, and had become the source of many disappearances. It turned out that a separate section of the mansion expanded far underground.
  • The title Mobile-Suit Human of Kemeko Deluxe!
  • The Death Room in Soul Eater, at least in the anime. It definitely has walls (which look like the sky complete with clouds, and can be broken) but the distance to them differs dramatically when Asura and Shinigami fight.
  • In Howl's Moving Castle, the castle's door links to buildings that are sometimes smaller than the castle's size.
  • The Hyperbolic Time Chamber from Dragon Ball is a seemingly-infinite White Void Room that fits neatly inside Kami's Lookout.
  • Haiyore! Nyarko-san:
    • Nyarko mail-orders a device called the Anywhere Dial, a Shout-Out to the magical door in Howl's Moving Castle (mentioned above). The Dial is attached to a closet in Mahiro's house to give Nyarko, Cuuko, and Hasta their own bedrooms since, before then, they'd been crashing in his living room. Notably, while Cuuko and Hasta seem to only have bedrooms, Nyarko almost seems to have her own house in there, complete with a kitchen and bathroom (and since it's Nyarko, it looks halfway between a regular home and a Love Hotel).
    • Back in the first season, Nyarko and Mahiro go to break up a black market auction; Mahiro quietly remarks that the auction house is a lot bigger on the inside, and Nyarko remarks that his tolerance for unusual situations is pretty impressive.
  • There are a couple of instances on Hunter × Hunter where this occurs:
    • In general, all users of Nen can generate ephemeral items out of thin air including entire environments and containers and can alter the physical characteristics of everyday items for diverse purposes, mainly for combat.
      • The Mafia's Shadow Beast Owl can fit all sorts of items of various sizes inside a small pouch of cloth without physical consequences; this applies to living beings too.
      • Shizuku's vacuum cleaner Demechan can consume vast quantities of inert or otherwise organic dead matter. It has never been stated where does all this matter go, since it cannot consume living beings.
      • Knov's portals lead to a twenty-one storied series of rooms called Four-Dimensional Mansions which serve as a base of operation for the extermination team. Initially, he uses the portals to lure unsuspecting Chimera Ants to their deaths at the hands of Chairman Netero; afterwards, he uses them as a place of rest before battle. The rooms are entirely artificial as created by Knov's Nen and are physically equivalent to the real world in all dimensions, though each room has its own size. Though the rooms are not bigger on the inside per se, they don't actually exist in reality and the Chimera ants are affected by the suddenness of the rooms' apparition and the room's lack of features.
      • The Chimera Ant Ikalgo's Nen lets it infiltrate a dead person's body without it reflecting any change in volume, even though Ikalgo is roughly 3/4 of the size of an adult person's torso, though in order to use his own abilities (such as the flea sniper rifle) at least a couple of his tentacles have to breach through the corpse's body.
      • Played with in the case of Kortopi, who can copy the physical appearance of things as big as entire blocks of buildings; the copies exist in the physical world, albeit temporarily.
      • Subverted by the in-universe video game Greed Island. When it's noticed that it's way too vast and detailed to be a virtual environment, it turns out that it's actually a physical place.
      • Subverted also by the ability of the Chimera Ant Cheetu, who in the rainy night time and out of thin air creates a seemingly vast grassland plain bathed in daylight in which he traps Morel; on close inspection, the room is spherical and it's contained by a wall, creating an optical illusion.
      • Inverted by the world of Hunter × Hunter itself in the geopolitical sense. The "human" world as it's known is but a small group of islands in the middle of a saltwater lake "ocean" completely surrounded by the Dark Continent, a largely unexplored land of gigantic proportions in territory, flora and fauna altogether. The powers of the human world have always wanted to explore it because of the vastness of its exploitable resources, but the violence and carnage to which the human expeditions are subjected to have kept all efforts in bay, implying that humanity is simply "allowed" to live exactly where they are: isolated from the fringes of their titanic world. As such, the human world is actually smaller on the inside
  • In Gugure! Kokkuri-san there's Inugami's dog house, thanks to his powers. On the outside it's a typical small shoddy dog house. On the inside it's a giant fancy bedroom, full of merchandise of his beloved Kohina.

    Comic Books 
  • Nextwave hung a lampshade on this with the Shockwave Rider, which is noted by the heroes that its interior is larger than its exterior. This is played with in the final issue, where "the thing that makes the ship bigger on the inside than it is on the outside" is destroyed and the heroes have to escape before they are crushed.
  • Reed Richards of the Fantastic Four has often set up rooms like this. When the team was living in Pier 4, this was lampshaded with a comment about borrowing technology from his weird doctor friend.
  • In Mighty Avengers, Hank Pym has been revealed to have one as well, using size-altering Pym Particles to hide an entire giant laboratory with multiple floors and huge rooms... all inside a single closet. Amadeus Cho immediately compares it to the TARDIS.
  • In Buck Godot: Zap Gun for Hire, the nearly omnipotent Prime Mover "lives in his own little world.... He keeps it in his quarters." Actually, it doesn't look all that little. He's terraforming his own planet, by hand. With a shovel. And filling an ocean with a bucket that also fits this trope. "You just need the right bucket."
  • The 1980's comic X-Thieves (short for "Aristocratic Extraterrestrial Time-Travelling Thieves") had the protagonists ride around in a "TARDIS-40 space yacht." Despite being able to use a standard New York City parking space, this was shown to have (among many other things) a planetary surface, or at least a significant chunk of one, inside it.
  • Fables:
    • The business office of Fabletown is bigger on the inside than out: it's indicated that nobody knows the full extent of the complex, although this is because the actual office is somewhere unknown and the building acts as a portal. They recently lost the building, and those inside the office are still trapped.
    • Fables also has the very important 'Witching Cloak' which can store much inside its folds, one of its many powers. (Careful; the weakness is it's still a cloak and can be yanked off like any other).
  • In Runaways, the Steins do their mad science in a spacious laboratory that looks like a small shed on the outside. Nico suggests that it might be a hologram.
  • Doctor Strange and his Sanctum Sanctorum. Of course, he's a wizard know.
  • Cubitus shows the eponymous dog passing through several chambers of an opulent palace... and eventually emerging from his ordinary doghouse.
  • Superman: For a while the Fortress of Solitude was one of these, being a tesseract located inside a puzzle-globe small enough for a child to wrap their arms around.
  • My Little Pony: Friendship Is Magic (IDW):
    • This trope is parodied in main series comic #24 with Discord's time machine.
      Scootaloo: This is your time machine? It's huge!
      Discord: Don't worry. It's smaller on the inside.
    • Bonus points by Discord wearing a bow-tie and fez as he says this. Even more bonus points by Dr. Whooves showing up from inside the time machine on the next page.
  • Shadowcrest, home of Zatanna Zatara.
  • In Captain Britain, Mad Jim Jaspers had a teapot-shaped helicopter that was bigger on the inside. (It was probably due to his reality warping powers, but he was also a technological genius.)

    Fairy Tales 
  • In the 5th-8th century Slavic myth of the witch Baba Yaga, her tiny hut is magically, on the inside, like a great hall.
  • One of the stories in A Thousand and one Nights has a tent like this.
  • This features in Celtic Mythology, where anything remotely like a door can be a doorway into a much bigger place. So the door to a tiny hut can well open into a large hall.
  • In Japanese folktales, Kitsune can create realms, turning a hole under a floorboard into a small estate, and turn a small field into a kingdom.

    Fan Works 
  • A Crown of Stars: In chapter 2 Daniel gives Asuka a pistol that does not need to be reloaded because "The magazine is a lot bigger on the inside than on the outside."
  • Shinji And Warhammer 40 K: The Boyz's operation room is a small broken house around their town's outskirts. It is bigger on the inside because its occupants had dug out a three-levels basement.
  • The World of the Creatures, being part Doctor Who crossover fic, has the Tardis. If you need any more information, check out the Doctor Who folder above.
  • In Children of Time, much is made of transcendental dimensions, thanks to the Doctor and his TARDIS.
    • The Tenth Doctor rummages through his pockets in the first episode, looking for paper, and finds yo-yos, candy, CDs, and Sherlock Holmes for Dummies first. In front of Sherlock Holmes.
    • A couple of the TARDISodes are written to allow the Companions to explore the TARDIS. Even after months of living there, Holmes still has a hard time wrapping his head around her size.
      Beth: Ha, I bet the Doctor could spend his entire lifetime exploring. The TARDIS is like... I get the feeling that it's less like she's bigger on the inside, and more like she's her own self-contained universe.
    • The TARDIS also holds a room that encapsulates a virtual Gallifrey. Holmes and Beth don't know just how real it is, or how far it goes...
  • In Total Drama Genesis, crates containing the "obstacles" for a challenge are opened to reveal far more contents than the crates would be expected to hold.

    Films — Animated 
  • The passenger planes from Cars 2.
  • The Beatles' Yellow Submarine has the band living in a place in Liverpool that's a grim little building outside, and bigger and more imposing than Versailles inside. The eponymous sub is similarly cavernous.

    Films — Live-Action 
  • Star Wars:
    • The Millennium Falcon interior is significantly larger than the exterior, mostly in regards to headroom. Due to the "cramped" interior, this is seldom noticed by the fans, even when toy models blatantly reveal this discrepancy. Hence, it requires no actual explanation. The difference is most visible when you see the Falcon docked in the Death Star. Compare it to the nearby Stormtroopers. Then compare its size earlier when they are all gathered in the lounges, and then take into account all the other rooms in the Falcon that are seen only in The Empire Strikes Back. The trope is compounded when you consider that the ship is supposed to be a freighter, with a lot of cargo capacity.
    • It worked out this way because the original plan for the Falcon's design was scrapped fairly late in production for looking too similar to the Eagle Transporters of Space: 1999. Thus, the set designers didn't really have time to make sure the Falcon's interior matched up properly with its exterior. Thus, the audience is supposed to just not pay attention to the size discrepancies.
    • The special irony is in The Empire Strikes Back, where Han evades enemy ships by entering an asteroid-field, and escapes by his ship being being smaller than the one-man fighters pursuing it, while likewise the Falcon is small enough to hide on the enemy capship without being noticed; meanwhile later, Lando reveals there's an elevator inside the Falcon to get to the roof.
    • The cave on Dagobah may be an example of this trope, depending on your point of view. Luke enters a hollow tree, and is suddenly seen in a large and foreboding cave. Some say this shows that his surroundings are as unreal as the phantom of Vader. Alternately, he may have climbed down through the small-looking hollow into a large cave, and we just didn't see it.
  • Loaded Weapon 1 parodies and lampshades this with Colt's trailer. Looks rather tiny from the outside, but is big enough to contain multiple rooms and columns on the inside. He explains that he picked the colors to make it look bigger.
  • Parodied in Freaked, where Skuggs keeps his collection of "freekz" in an outhouse that is somehow positively enormous on the inside; even the moon carved into the door becomes huge.
  • Spice World featured a magically huge bus with room enough for all the Spice Girls to have their own personal living areas the size of a studio apartment.
  • The cabin in The Evil Dead (1981) might as well be a TARDIS. It's extremely tiny from the outside but has many large rooms inside.
  • A variation is seen in the Beatles movie Help!. Each of the Fab Four enter into what appear to be four consecutive row houses. Turns out the four doors lead into the same huge bachelor pad.
  • Magical Mystery Tour ends with the entire cast filing into a little tent, inside which is a gigantic movie-musical set.
    • This is referenced and re-created in Across the Universe. In this case it's justified because the characters are tripping on acid during the scene.
  • In the Charlie Kaufman film Synecdoche, New York, a playwright creates a life-sized mockup of his home city inside a warehouse to use as the backdrop of his play. Naturally the set includes a life-sized mockup of the warehouse, which has another life-sized city inside.
  • In the Alien films:
    • In Alien, the Derelict may be an example, since the egg chamber looks much wider than any part of the ship seen from the outside. The novelization says the egg chamber is in a part of the ship buried underground, which could reconcile the discrepancy.
    • In Aliens, marines stand comfortably upright inside a transport vehicle, but are taller inside than when standing next to the thing.
  • Subverted in Bill & Ted's Excellent Adventure. The time machine they are given is a phone booth that they comment is "smaller on the inside". (Could they be making fun of something?)
  • Parodied in The Man with Two Brains: Dr. Necessiter's place appears like a tiny apartment from outside and like a spacious medieval castle from inside.
  • Flatspace technology in Ultraviolet can not only be used for disproportionate storage of materials, but can also make the inside of a trailer large enough to house a laboratory.
  • The movie Crossworlds, given that it's about parallel dimensions, takes full advantage of that. Many times somebody enters what seemed to be a small room or something similar, only to be greeted by a space reminiscing of a big warehouse.
  • In the (still animated) beginning of Enchanted, Giselle gets out of her coach in her wedding dress, and Nathaniel is run over by all the animals that were apparently in the coach with her (even though her dress is so big, it's hard to tell how she fit herself).
  • The interior sets for the Discovery in 2001: A Space Odyssey are 50% too large to fit into its spherical command module. This is surprising considering Stanley Kubrick's reputation for perfectionism.
  • In 2010: The Year We Make Contact, the Leonov's interior sets aren't even remotely the right shape to fit into its hull. Peter Hyams apparently wanted all of the rooms to be interconnected on the same level in order to film Walk and Talk shots.
  • In Jurassic Park, when Grant and Sattler enter their trailer, from the outside it's simply a camper that looks like it barely has enough headroom. Once inside, it's as big as a double-wide, and the ceiling extends a good 2-3 feet above their heads.
  • In a lot of Hollywood Musicals, internal sets start off small but magically become bigger when there's an extended dance scene. One example is the cabin in Seven Brides for Seven Brothers which looks small and poky from the outside, much to Millie's dismay when she arrives with her new husband, Adam. Yet when she leads the brothers in the Goin' Courtin' dance, the main living room grows to barn-like proportions. This is subverted a little in the later external barn-raising dance scene when the barn in question only looks to be about 12ftx12ft.
  • In the Korean film Hansel and Gretel (2007), the attic of the house stretches on for miles.
  • Mr. Mustard's van in Sgt. Pepper's Lonely Hearts Club Band has an interior that clearly defies its exterior. The inside is wide enough to fit around six people side by side.
  • In the Harry Potter universe:
  • 7 Faces of Dr. Lao features a circus tent which is rather modestly sized when viewed from without, but those who step inside find that it contains many large exhibit rooms as well as an arena with enough seating for the entire population of the town.
  • Lampshaded in C Lick, where the back of the "Bed Bath & Beyond" store is larger than it appears on the outside.
  • The titular aircraft in Soul Plane which is impossibly large on the inside, with room for a nightclub even.
  • In Into the Woods, during "I Know Things Now", a flashback shows Little Red plunging into the Wolf's belly, which appears to be the size of a large pit. Since the song is portrayed as a story that she tells the Baker, this could be interpreted as being part of her imagination. On the other hand she and her grandmother were both alive and intact inside its stomach, and the wolf is only human size, so this has to be at least somewhat the case.
  • The final scene of the 1995 film Safe starring Julianne Moore had the main character Carol enter an igloo type structure that appears to be substantially larger than it appeared only seconds earlier when viewed from the outside. Oh well, at least it's not a dishwasher fitting inside a Santa bag.
  • The Martians' spaceship in Santa Claus Conquers the Martians is shown as a dinky little ship from the outside that could maybe fit two or three people. Inside it can house a bridge, full electronics room, brig, and more. When the film was screened on an episode of Mystery Science Theater 3000 Joel and the bots even compared it to the Trope Namer.
  • Guardians of the Galaxy: Peter Quill's ship, the Milano, doesn't look like it could have room inside of it for anything other than the cockpit, but several scenes show the characters walking around in some fairly spacious interior compartments of the ship.
  • Doctor Whooves The Series has, apart from the obvious, Pinkie Pie. We don't know either.
  • The Alodi's cube in WarCraft is four-by-four-by-four metres on the outside, but potentially infinitely large inside. It's magic.

  • The Hitchhiker's Guide to the Galaxy
    • The planet Magrathea. On the inside, it's the size of a solar system, and they build planets in it.
    • The Restaurant at the End of the Universe takes this to its extreme when Zarniwoop has an entire universe in his (ordinary size) office. It's just like the real one, except that Frogstar Fighters are a different color ( and it exists entirely for Zaphod's benefit).
    • And during the reveal of that spoiler, we also find that Zaphod has been carrying around the starship Heart of Gold in his pocket, without even knowing it.
    • Is it really any wonder that Douglas Adams became a script editor for Doctor Who?
  • The NeverEnding Story name-checks this trope in describing the House of Change.
  • Myth Adventures:
    • The protagonists lived for some time in what appears to be a small tent, but inside it's a spacious house. Because it really is the entrance to a house in another dimension. The trouble comes when they open the back door and discover where it was built...
    • This is a common practice for Devan architecture, as it's hard for a haggling merchant at the Bazaar to plead poormouth when there's an obvious fifty-room mansion behind the shop.
    • Real estate on Deva is at constant risk of collateral damage as well as theft. It's cheaper to construct your mansion in an uninhabited or otherwise untravelled dimension and then build a standing, continuous dimensional portal that leads onto Deva.
  • In Greg Bear's Eon, the fact that the seventh chamber aboard the Thistledown is this is proof that someone has finally understood the work of the female physicist protagonist.
  • In Bulgakov's The Master and Margarita, Woland's immense ballroom appeared behind the door of an ordinary Soviet apartment (which was previously shown to be perfectly normal); one of the characters says that this is easy to achieve when you are "familiar with the fifth dimension."
  • Played for horror in House of Leaves, in which the Navidsons' house is precisely 5/16 of an inch larger on the inside. Shortly after coming to this realization, the Navidsons also discover that the house's closet suddenly leads to a vast labyrinth of unknown purpose and origin. In many editions, the pages stick out about a quarter-inch past the edge of the cover, making the book "bigger on the inside."
  • In Teresa Edgerton's The Grail and the Ring, Dame Ceinwen's cottage appears to be an ordinary one-room cottage from the outside, and even from the inside — except that you can never quite see the entire room from inside. When you explore the perimeter of the room, you find doors opening into other rooms, cupboards, and so on.
  • The Gay Deceiver in Robert A. Heinlein's The Number of the Beast has more space inside, obtained as a gift in Oz.
  • The "stable" in The Chronicles of Narnia: The Last Battle is tiny on the outside, yet when the characters enter, it contains the whole of "Aslan's Country". As they travel further through the land, the arrive at a walled garden on a hill, but again, once they enter they find a whole country spread out before them; an even better version of the land they came through. It is implied that there might be an infinite number of such layers. The stable was unusual in this respect. Not everyone who entered found Aslan's Country - a party of dwarfs who entered it found only the very ordinary dark and grimy interior of a stable. Both alternatives coexist simultaneously, as the protagonists interact directly with the dwarfs despite perceiving a completely different world. This is perhaps more a case of Clap Your Hands If You Believe.
  • In Garth Nix's Keys to the Kingdom, this applies to pretty much everything in the House. (Not to be confused with the house.) For example, suitcases and Matryoshka dolls.
  • Discworld:
    • In the books that focus on Death, his mansion is described as having rooms of a mile or more in area, despite looking like a normal cottage from outside. Normal humans who visit Death's domain usually ignore the incredible hugeness and stand on small patches of carpeted normality in the sea of immeasurable blackness. Allegedly, it's an accidental example: Death simply forgot that houses weren't supposed to be this when he created it.
    • The Tooth Fairy's residence in Hogfather looks like a small house from a child's drawing on the outside, but its interior is a multi-story tower large enough to house display cabinets for millions of teeth.
    • The library of Unseen University also is much bigger on the inside - like a Black Hole that can read. In fact, the Library is connected to L-Space, which connects together all libraries, bookshops etc., so it's more than just bigger on the inside...
    • In Sourcery the heroes transport themselves in a magic lamp which they are carrying at the same time (with the lamp also inside itself). The trick is in pulling this off before the laws of physics find out.
    • When Rincewind first sees the inside of Death's cottage in The Light Fantastic, the narration comments that he's so used to this that "The way things were these days, he'd have laughed sarcastically if anyone had said you couldn't fit a quart into a pint pot."
    • The Temple of Bel-Shamharoth in The Colour of Magic, and the Lancre Caves in Lords and Ladies. The space inside the Dancers in Lords and Ladies hangs a lampshade on this, "The circle was a few yards across, it shouldn't appear to contain so much distance."
    • Unseen University, aside from the Library, is said to be expanding constantly, especially its maze-like corridors.
    • In The Last Continent, Bugarup University has a tower that's Taller at the Top: from the bottom, and while climbing it, it only seems to be about twenty feet tall, but the view from the top appears to be half a mile up.
  • Similarly, though not played for laughs, in Patricia Mc Killip's Harpist in the Wind (third in The Riddle Master Trilogy) there's a tower with an external spiral staircase that appears to be finite in size, but when you try to climb it you'll find that the top is always the same distance above you... unless the owner feels like letting you in.
  • Harry Potter:
    • Several locations, mostly those which are Invisible to Normals, are hidden in small spaces: Grimmauld Place, Platform 9¾, the tents the Weasleys use at the Quidditch World Cup... but this is literally because A Wizard Did It.
    • Hermione's tiny little beaded handbag in Deathly Hallows. It fits in her sock, but it contains clothes, books (many, many books), tents, and a framed portrait.
    • Arthur Weasley expands the inside of his Ford Anglia so the entire Weasley family and then some can fit inside comfortably. The Ministry Cars from Prisoner of Azkaban work the same way.
    • The ability to make a location "unplottable" (i.e. impossible to be included on a map) is an interesting case. The implication is that from a map-maker's point of view the world around the building contracts to fill the empty space and the building itself then resides on a plot of land with zero area. This is related to Grimmauld Place appearing out of nowhere in the films.
    • Diagon Alley may very well be the ultimate version of this within Potterverse. For instance the entire alleyway fits inside of a brick wall behind a tavern and is thus squeezed between two Muggle buildings. However, when you enter the Alley, it is almost an entire city unto itself despite being inside of London. Arguably the entirety of Diagon Alley is unplottable, including the tavern behind which it is situated, because it is invisible to everyone who doesn't know it's there. Oh and, then you have Gringotts inside of Diagon Alley, which houses the sub-sub-sub levels of the entire London underground and which is unknown to the ground penetrating radar of the Muggles for some reason.
  • In The Magicians, many buildings are larger on the inside, such as the house that the Physical Kids hang out in. This is explained by A Magician Did It
  • Ryhope Wood in Robert Holdstock Mythago Wood: the protagonist says he can run around it inside an hour, but when he tries to go through...Time also runs differently inside it.
  • In Halo: Ghosts of Onyx we see an enormous Dyson Sphere hidden within a tiny slipspace bubble located in the core of an Earth-sized planet.
  • Dr. Morgenes's home/lab/pub in Tad Williams's Memory, Sorrow and Thorn trilogy looks like a barracks from the outside, but inside seems just a little too big.
  • Many buildings in the Nightside are like this, which is to be expected in a place where space is at a premium and so many people know magic.
  • Subverted in Callahan's Crosstime Saloon; the alien Squish's saucer is smaller on the inside than on the outside, since they haven't gotten the technology right.
  • John Crowley's Little, Big : this trope (and the title of the book) refer to both the Edgewood house and Faerie being 'bigger in the inside' (a kind of topographry one of the characters of the novel refer to as an infundibulum).
  • A Song of Ice and Fire: the Halls of the Undying are a lot bigger on the inside. The most obvious difference is a staircase leading upwards whereas the building doesn't have a tower.
  • The Berenstain Bears' treehouse.
  • Clothahump's tree in the Spellsinger series.
  • Solembum mentions he has seen rooms that are bigger on the inside in Inheritance.
  • The House of the Osugbo in Who Fears Death.
  • In The Dresden Files, in the first book it is mentioned in his yellow pages ad Harry and other Wizards can create "[e]ndless [p]urses;" but for an unstated reason, Harry won't.
  • The Fablehaven books have the transdimensional backpack with a storage room inside.
  • In Nightwings by Robert Silverberg one character has a device called an overpocket implanted in his leg, which contains a nearly unlimited amount of useful items.
  • In Ssalia and the Dragons of Avienot, the "cosmic" library inside the jade tower is stated to exist outside of normal physics, allowing it to expand perhaps indefinitely and possess its own sky instead of a ceiling.
  • Monday Begins on Saturday has the NIIChaVo building. Outside, it is two stories high with ten windows per story, inside it is over a kilometer wide and has twelve stories for institute alone, and over hundred other stories.
  • In Voyage of the Basset, the titular ship fits this description, much to the consternation of the "sensible" Miranda.
  • In Those That Wake, the building and its doors lead to places like this.
  • Robert A. Heinlein:
    • "--And He Built A Crooked House--" features an eight-room house occupying the space of a single-room house. This is because the house was conceived and built as an unfolded tesseract projected onto 3D space, but an earthquake caused it to fold into a real tesseract.
    • The foldboxes in Heinlein's Glory Road. Not very large or heavy when closed, they can be opened out (by unfolding several times, hence the name) to reveal a cavernous internal space and all the items that have been stored there. Handwaved in the story as being because when closed, the internal space (and its contents, and their mass) go off to another dimension.
  • In the Manly Wade Wellman short story, The Golden Goblins, the spirit bundle contains at least fifteen figurines, and yet it's only large enough for one.
  • Inside of the House of Silence, from Awake in the Night Land, is bigger than the planet Jupiter. This is explained by stating that the house occupies more than the usual three dimensions.
  • In Dora Wilk Series, the inside of Viola's cart is the size of a small pocket dimension, with Witkacy unable to see where it ends. He supposes that either the door is a portal somewhere else or it's just an illusion.
  • In The Nekropolis Archives, the Great Library of the Nekropolis is much bigger on the inside than it appears from the outside.
  • In Shaman Blues, the villain's house is much bigger than it looks on the outside, enough to get completely lost in. Witkacy wonders whether there's a way to make his tiny flat the same way.
  • The Rhoades Mansion in Spectral Shadows is this, even while it appears as a multistory mansion. It's so much this that it's easy for even the people who live in it to get lost if they stray from where they normally go, and contains lots of secret and hidden passages. The fact that it's a shapeshifting Time Travelling ship does help explain a few things, though...
  • In the Stephen King novel It, one of It's hiding places is a deserted house out by the trainyards. When the kids enter it, they find themselves getting separated as the rooms grow larger as they explore the house. Also, earlier in the novel, they follow a Native American ritual and subject themselves to smoke inhalation in their clubhouse so they can have a vision. Before the vision begins, the small clubhouse seems to have grown impossibly huge.

    Live Action TV 
  • On Seinfeld: Jerry's apartment is a good deal bigger on the inside than should be possible from the exterior shot of the hallway.
  • Buffy the Vampire Slayer: Sephrilian's realm is inside a small one story house, which contains an endless staircase, and Sephrilian himself.
  • The myth of Baba Yaga is parodied in The Mighty Boosh with Babu Yagu, aka The Hitcher, whose travel chest contains an entire zoo.
  • The Pylons from Land of the Lost
  • The Foundation's mobile command Semi in Knight Rider was shown to be barely wider than KITT, who was the size of a standard 1982 Trans Am, while the car was pulling into or out of it. However, once in, there was enough room for the car, quite a bit of equipment, and even a picnic in one episode. It was wide enough for both of the car's doors to be wide open with room to spare.
  • Star Trek:
    • In Star Trek: Enterprise, the time travel pod from "Future Tense". Originally, the plan was for this episode to be an actual crossover with Doctor Who, but copyright issues and thematic questions kept that from going past the "Hey, I've got an idea" stage.
    • Star Trek: The Original Series: The Shuttlecraft used a different model for the exterior than the interior. The interior set was big enough that the actors could walk around standing upright while in the exterior they could only stand hunched over, hence the reason they are always hunched over when they step out of the Shuttlecraft.
    • The holodeck from Next Generation is specifically engineered to create the illusion of this. The manual states that it uses force fields on the floor to create a treadmill-like effect, then adjusts the view around you to make you think you're actually moving. It also lenses the air in such a way as to make two people look distant if they "walk" away from one another, even though they're really close to each other.
  • The Egg (or Trans-Dimensional Navigation Module) in Galidor has several internal levels but certainly doesn't look like it from the outside. Seems to be played with. The Egg is barely bigger than a trailer and has two entrances. Each one, however, leads to completely different levels.
  • Oscar's trash can from Sesame Street is also depicted as huge on the inside.
  • Red Dwarf's ship-to-planet shuttle Starbug gained an implausibly large set of interiors when it became the show's home base in Series 6. This was worked into the plot in Series 7, when a paradox caused by an exploding time machine expands the shuttle's innards even further (by merging it with its future self from a mooted timeline). Among other features, the paradox-enhanced 'Bug has two miles of spacious service ducts. This is explained in the first episode of Series 6, because the crew have been in stasis for a large period of time, while Kryten is working on renovating the ship. The production team were aware of this and reduced the size of the cockpit windows on the Starbug model when they switched from physical props to CGI to compensate.
  • And lets not forget the interior of 'Thunder', the name-giving boat of the award-winning show Thunder in Paradise.
  • The Warehouse in Warehouse 13 is huge on the outside, but once you're inside it becomes the Warehouse that never ends. It's built into the side of a mountain and designed by M. C. Escher.
  • In Engine Sentai Go-onger, The Ginjiro-go has a large-sized HQ within.
  • Full House lampshades the dynamics of the family's house in the last episode.
  • The spaceship Jupiter 2 from Lost in Space fits this trope. In the original unaired pilot, it had only a single deck, and the external scale clues (view ports & airlock door) were proportioned to match. By the first aired episode, however, the script had added a second living deck, which obviously could not fit inside the exterior. It got worse when you considered that they had to fit the Chariot (a van sized land vehicle) inside somehow – and became ridiculous when the Space Pod and its launch bay were retconned in during the second season. The heights of the ludicrous, however, waited for a third-season episode, in which a never-before-seen third deck was added (and then instantly forgotten). To make matters worse, the “Full Scale” crash-landing-mode mock-up was not only too small, it was obviously proportioned differently from the flight model.
  • Galen's ship in Crusade looks no bigger than a standard shuttle. We are only shown a glimpse of the interior (when Gideon is rescued by Galen in a flashback), but it looks much roomier inside. Of course, given that this is a technomage ship, it makes sense (it's likely just an illusion).
  • An early 2000s Playhouse Disney show called Out Of The Box took place in a house built out of several large cardboard boxes piled together, but inside it's a large room that could never be made out of a few boxes.
  • While it's genuinely played for camp value, the Battletram in The Aquabats! Super Show! looks like a simple converted motorhome on the outside, but any scenes filmed inside give it a LOT more space than what should fit in it. It has enough space to comfortably fit a room full of partying kids, Jimmy's research lab, an expanded cockpit, a bedroom enough for the entire group, and a restroom much larger than what would normally be in a motorhome, and it STILL has enough hallway space to allow for chase scenes.
  • In Grimm, the trailer interior set is considerably bigger than the outside.
  • The X-Files, "Sunshine Days": The Monster of the Week's house appears very small from the outside. From the inside, however, it's the house where they shot The Brady Bunch. The guy has a super strong psychokinetic power.
  • The Brady Bunch features a one storey house on the outside with two storeys on the inside, along with an attic and a basement. In fact, the interior shots of the living room seem to be about the same length as the outside of the house.
  • Haven has The Barn. An ordinary barn on the outside, a seemingly endless maze-like White Void Room on the inside.
  • In Constantine, the titular character's hideout, an old mill house outside of Atlanta, is a lot bigger on the inside; it's justified since the mill house is enchanted.
  • Les Lives, a spin-off of Vic Reeves Big Night Out. Les lives in a striped workman's tent with a cavernous interior. It might actually be a TARDIS, given that, whenever Les exits it, it's never where it was when he went in, although Les never notices this.
  • The house layout in The Golden Girls changes depending on which episode you're watching, but each of the girls has a large bedroom, and at various points in the series it's either shown or stated that each has her own full bathroom (plus there must be at least a half bath somewhere for guests). The part of the living room that viewers regularly see is massive to begin with, but its fourth wall has been shown to be hiding a TV, an upright piano, and a long dining-room table.
  • The first hint that this trope is in effect in Beyond The Walls is the door into the labyrinth of the House: Lisa uses a hammer to break into a wall that can only be a few feet thick, but it accomodates a whole corridor and a full-sized door. Then, once in the House proper, all bets are off as to how big the thing really is.

    Newspaper Comics 
  • Beetle Bailey: Boner's Ark takes place on a boat that from the outside looks like a rowing boat with a deep hull and one tiny cabin. Since it houses dozens, possibly hundreds of anthropomorphic animals (including one tyrannosaurus rex), it's obviously much bigger than that.
  • Peanuts: Snoopy's doghouse is probably one of the more "classic" examples. It looks standard on the outside, but contains several large, opulently decorated rooms (and the famous Van Gogh/Andrew Wyeth painting).

    Professional Wrestling 
  • The WWE ring seems to be this way as seen in the 2009 "Little People's Court" episode of WWE Raw where Triple H and Shawn Michaels went underneath the ring, only to find a corridor and a courtroom full of dwarves. It might also explain the various times The Undertaker and Kane have crept their way through the ring, dragging their victims through the hole and into the fires of Hell.

    Puppet Shows 
  • The Big Blue House of Bear in the Big Blue House, despite its name, really doesn't look on the outside like it could really fit a big ol' Bear, a lemur, a mouse, two otters and a bear cub; yet it does, quite cozily.
  • Oscar the Grouch's trashcan on Sesame Street is apparently big enough on the inside to fit several elephants. He once held an elephant dance in there.

    Tabletop Games 
  • GURPS: Spaceships has a ship designed like this as a Shout-Out to Doctor Who.
  • Dungeons & Dragons
    • This is the stated explanation for the Bag of Holding and the Portable Hole. In an attempt to prevent game exploits, sticking one inside the other tears open the portal that leads to the Hammerspace and sucks everything in. Though some more enterprising players have used this as weapons, to the chagrin of many DMs.
    • Spells such as Mordenkainen's Magnificent Mansion allow their casters to invoke this trope.
    • Baba Yaga's hut, justified by it being home to one of mythology's most formidable witches.
      • In its original appearance in the 1st Edition Dungeon Master's Guide, it was said to be 15 feet wide and 10 feet high. Inside it was a small palace, with a garden, fountains and thirty rooms on three floors.
      • The Dragon magazine #83 write-up extensively depicted the interior of the hut as per the DMG entry.
      • The 2nd Edition module The Dancing Hut of Baba Yaga was yet another version that was much more extensive and completely different from the Dragon module.
      • This was carried over to Pathfinder when said hut appeared in Artifacts and Legends and Reign of Winter.
    • Basic D&D supplement The Book of Marvelous Magic. From the outside the Tent of Luxury appears to be 3 feet wide by 6 feet long. When someone goes inside it's an area of 120 feet square (14,400 square feet).
  • Warhammer 40,000:
    • Most transport vehicles. No way 10 Space Marines fit in a Rhino.
    • In-Universe examples include;
      • Eldar Webway, which manages the neat trick of being both bigger on the inside - that is, you can go through a small portal and find yourself inside a kilometres long webway passageway - and Smaller on the Inside - because you can use that kilometres long passageway to cross interstellar distances. Alien Geometries apply.
      • The Dark Eldar city of Commoragh goes one better, by being bigger on the inside within the Eldar webway, making this a recursive application of the trope.
      • Some Necron constructs are either this or have extensive Portal Door networks.
      • Anything related to the Warp plays this straight or completely inverts it, due to the immaterium taking the laws of physics and causality as suggestions at best. Gets even worse in any realms controlled by Tzeentch, who will invert and play this trope straight at the same time just to dick with whoever's looking.
  • Mage: The Ascension gives us the Correspondence sphere. At level 4, plus Prime 2, you can create your own bigger-on-the-insideness. Make sure no sleepers walk in, though...
  • The Numenera core rule book comes with a sample adventure "Three Sanctums" has a mysterious cube about 3.4 meters in height, which, if you manage to somehow enter it, turns out to be a sphere 260 billion km in diameter, with the star known in our time as Antares placed at its center by The Precursors.

    Theme Parks 
  • Many a Disney theme park ride has a smaller exterior that couldn't possibly hold the entire attraction. The facades hide the fact that the actual ride takes place in a warehouse-style show building hidden from the park.
  • The haunted castle in the Scooby-Doo scene from the former ride, The Funtastic World of Hanna-Barbera, features some extremely long halls despite its modest exterior.
  • The house featured in The Cat in the Hat feels much more like a mansion throughout the ride, with even the closet being bigger than some apartments.

    Video Games 

  • Pokémon is a prime example. If you can go inside it, expect it to be a lot larger inside unless its outward appearance is intended to be imposing (such as a department store.) Some of the gyms even have interiors bigger than the towns they're in.
  • Lampshaded in Strife; at one point Blackbird says "Y'know, from the outside this place looks tiny."
  • Super Mario 64:
    • There's a sub-area in the level "Snowman's Land" which is reached by going into an igloo which is so tiny, Mario has to crawl to get in. But inside, it's almost a quarter the size of the main level itself.
    • And there's the Black Room of Death inside the front wall of the castle, which is bigger than the wall is on the outside.
  • The castle levels from the original Super Mario Bros.. Even more so in the SNES remake, where their walls actually no longer extend offscreen.
  • The jars in Super Mario Bros. 2, where on the outside, they are as wide as your character, but inside, they take up the whole screen, with sand, wood blocks, planted items, and enemies inside them. The GBA remake even has ones with Ferris wheels inside them.
  • The Comet Observatory domes from Super Mario Galaxy.
  • The inside areas from the Mario & Luigi and Paper Mario series. In Superstar Saga for instance, Woohoo Hooniversity, Joke's End and Bowser's Castle look fairly small on the outside, but are absolutely enormous on the inside, having hundreds of rooms and covering what must be miles of land. In Bowser's Inside Story, both Bowser and Peach's Castles appear fairly moderately sized outside (to the point you can fight them in a giant boss battle), but are way, way bigger on the inside. And in Dream Team, Neo Bowser Castle is absolutely huge when you compare its interior to the size seen in the cutscenes. Paper Mario examples include Boo Mansion, Tubba Blubba's Castle, Bowser's Castle, the Palace of Shadow, and Castle Bleck among others.
  • In Unreal, whenever the game loads a new level while entering an enclosed space (mostly spaceships, but some structures too), you can expect the level itself to be much larger than the structure you saw from the outside before the loading screen - and not to follow its geometry very precisely, either.
  • The Legend of Zelda:
    • In The Legend of Zelda: Ocarina of Time, the whale-like Jabu Jabu has a sprawling dungeon inside his bizarre digestive system. The Deku Tree seems bigger inside as well, but still resembles a tree, somewhat.
    • And again in The Legend of Zelda Oracle games.
    • In pretty much all of the games, houses look a lot smaller on the outside. Especially the 2D games.
    • The Legend of Zelda: A Link Between Worlds has an odd variation with the House of Gales. It is located in the middle of Lake Hylia, and you can swim all the way around what appears from the outside to be a building barely over 1-story tall. Like most Zelda dungeons, the inside is actually a large sprawling labyrinth. However, the upper levels of the dungeon take you to outside ledges, where you can see the structure towering over the lake on a much larger scale than it appeared from the lake itself. So the House of Gales somehow manages to be "bigger on the outside of the inside," if that makes sense.
  • The village of the Weavers in Loom. Despite being simple tents (roughly as large as a pup tent), the insides are much larger. The main temple housing the Loom is a veritable cathedral. Justified, since the Weavers are capable of warping the fabric of time and space.
  • The Ebon Hawk in Star Wars: Knights of the Old Republic is noticeably larger on the inside than the outside. However, considering it is based on the aforementioned Millennium Falcon, this could be contrived as a something of an Affectionate Parody.
  • The Normandy in Mass Effect is also larger on the inside. Even while the second Normandy from Mass Effect 2 is over twice the size of the original, the exterior still falls short of being the correct size to house the interiors.
  • Touhou:
    • Eientei and the Scarlet Devil Mansion. The head maid of the Scarlet Devil Mansion likes to play with time and space, expanding and contracting dimensions to do her housework. Eientei contains (or contained) at least one hallway whose length is impossible and whose ultimate destination is the moon.
    • Possibly the ultimate example is Miko's pad, Senkai. It's an infinite space contained in a tiny crack.
    • Fanon often depicts Kisume's bucket in this manner. While it looks like an ordinary wooden well bucket, and her head is poking out the top as if she's simply sitting in it, fans have interpreted the bucket as Kisume's home, which she can duck down inside of and find everything a person would need to survive.
  • Odd as it may seem, EVE Online. The containers (or "cans") that you buy on the market allow you to store, in the smallest can, 120 m3 worth of stuff, in an item that only takes up 100! The jettisoned containers ("jet cans") also count, as they can hold 27,500 m3 worth of items, from a shuttle that may only have a 10 m3 cargo hold. (Even positing that the jet cans are collapsible, like cardboard boxes, 27,500 m3 is roughly equivalent to the capacity of the largest of the industrial haulers, heavily modified for additional cargo space.) Partly, this is Hand Waved by freight containers having a "compression field" (for the same reason, you can't put livestock, passengers and some foods in them).
  • Halo:
    • Halo: Combat Evolved:
      • The outside model for the Pillar of Autumn is smaller than the (inferred) distance the player has to travel in the final level. Lookit.
      • This trope is also inverted if you consider the level where you have to run from the bridge in the very front of the bow to the engine room in the stern. By that level the Pillar of Autumn is actually considerably SMALLER then the outside model.
    • The Spirit of Fire from Halo Wars, considering the amount of resources and forces it sends down. The Elephant too for that matter. You can train 40 soldiers out of it, despite the fact it looks like it can hold no more than 20, maybe 30. and even that's pushing it.
  • Same thing with the Ishimura in Dead Space. When the shuttle approaches the ship in the games opening, the model is much smaller than it is supposed to be, and probably too small to house all the games levels.
  • There's an interesting psychological employment of this trope in EarthBound. The Tenda of the Lost Underworld believe they have built a cage around the dinosaurs there, even though they are the ones actually inside said cage. Therefore, to them, the cage is bigger on the inside than the outside. EarthBound itself, as well as predecessor MOTHER, also played this trope straight in the usual sense. Its sequel MOTHER 3, however, did a pretty good job of averting it, or at least making it not particularly egregious.
  • In God of War II, the player faces off against a colossus statue brought to life. After finally receiving a weapon able to pierce the outside deep enough to enter it, the player and Kratos enter the statue, which is somehow several more stories tall and far larger overall on the inside. The face itself is far larger as well. In fact, the inside of the statue, compared to the inside size of the face implies the entire thing is disproportionate.
  • Donkey Kong 64 did this a lot.
    • Most notable is K. Lumsy's island. On the outside, it's small enough that one could probably jump on top of it. On the inside, the ceiling is probably at least 20 to 30 times the height of the Kongs. Same goes for the diameter.
    • Banjo-Kazooie does this a lot as well. Most notably inside the circus tent in Witchyworld in Tooie.
  • Glint's lair in Guild Wars. On the outside, it's a single grain of sand, hidden in a vast desert. On the inside, it's a huge labyrinth filled with traps.
  • Harvest Moon is a massive offender. The player's house is always pretty darn small in all of the games (or at least the ones I've played), especially on the outside. Particularly in Magical Melody and A/Another Wonderful Life, the player's house on the outside looks so tiny that you'd think they can't possibly have any room to lay down straight. The inside, though, is more than large enough to hold a bed, a television, a refrigerator, a kitchen, a bookshelf, a storage closet, and more. This don't improve much with house size upgrades you get later on, either.
  • NetHack, Slash EM and similar roguelikes. The full games rarely go past 5mb, but without extensive knowledge of the game or cheating and, of course, luck, you can spend an entire year trying to finish it.
  • StarCraft:
    • At the end, the inside of Tassadar's ship is significantly larger than it's seen on the outside. Of course, in most RTS games the buildings are churning out battle ships 5 times bigger than itself, so some distortion is necessary.
    • Also in the same game, during the original Zerg campaign, Kerrigan (now infested) goes with a small Zerg force inside of a Science Vessel to get a classified Ghost Program data to break her ghost conditioning to access psionic powers. A Science Vessel is about the same size of a Siege Tank in the game? How about in this mission? It's quite huge.
  • Marathon, Descent, and Duke Nukem 3D:
    • The game engines are based on connected spaces, not Euclidean geometry. This allows for impossible physical arrangements, like a circular hallway that must be traversed 720 degrees to get back to the starting point, a Klein bottle-shaped room, or a Mirror World in the same space as the normal level.
    • Behold this in action. Most of the level is in a closet in a room, itself in a closet in the aforementioned most of the level.
    • This occurred with ZX Spectrum games as well; for instance, the Attic in Atic Atac had two overlapping rooms in the same space. This may have been done deliberately to make mapping difficult.
  • Averted and played straight in the second movie-based Spider-Man video game. Restaurants, diners, flower shops, banks—those are just as big on the inside as they "should" be based on the outside. The two Shocker hide-outs, however, clearly are Bigger on the Inside.
  • In Animal Crossing: Wild World and City Folk the closets in the game were capable of storing 90 items, while the closets in New Leaf can hold 180 items, a stark contrast to the closets in the original game which stored a measly 3 per storage item. In all the games, buildings are shown to be at least slightly larger on the inside than they are on the outside.
  • World of Warcraft:
    • The game generally averts this. Instances (that is, dungeons, but they're often not dungeons in story terms) are generally inaccessible aside from the one designated entrance, and are generally underground or in enclosed buildings, but if you go to one that's not an enclosed building and if you find a way to access them anyway you'll generally find that they take up as much space in the outside world as exists inside the instance. However, there are a few exceptions. Most notably, places controlled by mages are likely to be bigger on the inside - a notable example is the "Tower of Karazhan", which is positively palatial inside. The Mage Tower in Stormwind lampshades this trope by limiting the tower itself very strictly to what could be contained inside - but at the top is an explicit portal to a much larger extradimensional space.
    • Probably played straight with Blackrock Spire, a huge instance even for the mountain that contains it. And then there's Blackwing Lair and Blacwing Descent...
    • Blackrock Spire and Blackwing Lair (technically part of the same instance map) itself is actually an aversion. Careful examination of the instance map files (the instance contains a copy of the mountain from the exterior world, only without the entrances) reveals that the instance JUST BARELY fits into the mountain.
    • The mage city of Dalaran, on the other hand, completely averts this trope: it's exactly as large as the outside suggests.
    • Played Straight with the Bilgewater Cartel's Town-In-A-Box, which is a box of about 1 foot by 1 foot by 1 foot, but is able to contain several buildings, multiple people, and according to quest-text, a dock and an oil rig.
  • In XIII, the submarine is absurdly large on the inside and tiny on the outside.
  • The barns in the online game Farmville. If one chooses, they are capable of holding dozens of entire buildings inside them, each much, much larger then the actual barn itself.
  • Baldur's Gate is pretty common with this. A house looks like a pathetic slum on the outside. You send somebody in (usually to loot the place) and it turns out on the inside it's got a dozen rooms and, while still being a pathetic slum, it's a pathetic slum about the size of a small mansion.
  • The Wake of the Ravager series had magic tents that were explicitly bigger on the inside.
  • The trucks in the NES version of Metal Gear. Go inside, and instantly you notice the scale have started to move. The MSX2 version had this as well.
  • Inverted for laughs in the tie-in adventure game for Callahan's Crosstime Saloon. In one stage you have to hijack a friendly alien's saucer. Unfortunately it's smaller on the inside than the outside, because "his race hasn't got the technology straightened out yet."
  • The Elder Scrolls:
    • It applies to a degree. While the cities are to scale (and in case of Morrowind, the overworld in its entirety), the houses inside the cities are usually bigger on the inside.
    • In Oblivion, almost every castle in the cities are bigger on the inside. The most noticeable is of course Cheydinhal's castle, of which the exterior is wider than the interior and the interior could certainly not fit in what appears to be the exterior.
    • The Dwemer Lockbox in Septimus' Outpost in Skyrim is totally this. The inside of the cube is at least twice as big as the outside. Even the tunnel leading into the cube is longer than the cube itself! This is because it houses Hermaeus Mora's Oghma Infinium, and as such is an Eldritch Location.
    • Skyrim's Hearthfire DLC averts this with the houses you can build. You build a house one section at a time, and each section stage by stage (foundation, flooring, frame, walls, roof), and only after the section you're building is completely walled off does it become a separate "cell" which you can only access through a door and a loading screen. Once you go through that door, though, the inside is exactly as big as it looked from the outside while you were building it.
  • Averted in the Gothic games. Every city and house interior is part of the overworld and exactly the same size on the inside as on the outside.
  • Blood Omen: Legacy of Kain: The structure in the center of Dark Eden, explicitly.
  • Subtler example: The map Well in Team Fortress 2 has bases that are bigger on the inside, though not very much. There's no special trick of non-linear geometry going on (the engine doesn't even support such a thing); they just hid part of the interior behind a Skybox and projected the rest of the building's façade onto it.
  • Speaking of that engine, Portal 2 has an even more subtle but much more high-tech example: they developed a method for seamlessly connecting nonadjacent areas in a level, purely to simplify the development process. When the game was being finished up, they replaced all of these links with physically-connected areas except one, a room that is imperceptibly bigger on the inside.
  • Grandmother's House in The Path. On the outside, it's a small, perhaps one-and-a-half story cottage; inside, it's impossibly tall and narrow, going up six or seven stories and containing a pair of endless corridors.
  • Ships in the X-Universe series use subspace compression technology to make the cargo bay bigger. This means that an M5 scoutship not much bigger than a modern F-16 can carry at least a dozen people in a space roughly the size of a refrigerator. The process, incidentally, is fatal to lifeforms unless an additional life-support package is installed, and it remains rather unpleasant to undergo.
  • Monstro the whale in the Kingdom Hearts series is much bigger on the inside then the out. This is especially evident in Kingdom Hearts 3D, where Sora fights a boss battle that takes place on an icy ring around him, and you can see that he's small enough that about four or five of him could fit in some of the areas that Riku explores within him.
  • Lampshaded in Sid Meier’s Alpha Centauri (the Alien Crossfire expansion) with the "N-Space Compression" technology. Effectively, it allows larger payloads in missiles and Planet busters. The tech description claims that the extra mass is stored in other dimensions.
    "Humans : there is no space inside rocket. Progenitor : space exists around all things with mass. Space : "here". Inside rocket : "there". Secret: bring here to there."
    — Caretaker Lular H'minee
    "Secret : Space"
  • In Star Wars: The Old Republic, full-scale models of the republic frigate can be seen up close in various places. There is absolutely no way that the interiors of the Esseles and Black Talon flashpoints, both of which partially take place in one of those frigates, could fit inside.
  • Most transports in Dawn of War can carry up to three infantry units (upwards of thirty men) while their tabletop counterparts are restricted to one squad of usually no more than ten.
  • The alien spaceship you explore in Tomb Raider III looks pretty small on the outside, but the inside is three times larger than the exterior.
  • RPG Maker games you can find online can be small in file size, unless developers paid close attention to building size.
  • Rodina, a space exploration game, though developer says it's not intended feature.
  • Pulled off exactly as unexpected in ROBLOX, in this. Notably, it's a see-through object that becomes much, much less see-through on one side. And you can step into it. A see-through, white square composed of lines. There is literally nothing inside it, and yet there is. It's called the Paradox Box for a reason.
  • Some developers can create games, or certain parts of a game, that only take up a very small amount of space yet the content of the game is much bigger than it appears. Treasure's Ikaruga features impressive 3D scenery and a high-quality soundtrack yet the original arcade game only took up about 18MB; the Xbox LIVE Arcade re-release of the game features 720p high definition visuals and only takes up about 50MB, smaller than other high definition titles on the service.
  • This is quite common in Little Big Adventure (both games), with the buildings looking rather small from the outside but being surprisingly spacious from the inside.
  • Played for horror a few times in Silent Hill, and justified by the titular town's reality-warping qualities. The biggest example might be the Historical Center / Toluca Prison / Labyrinth, an increasingly dark and claustrophobic series of subterranean dungeons that require the protagonist to keep jumping down holes, until it seems like he's at least a few miles underground with no escape. And then, he reaches the final door and finds himself back outside, only a short distance away from where he originally entered.
  • Played for Laughs in Fur Fighters. Juliette has an absolutely colossal wardrobe in her house.
  • Warframe dropships were built by the Tenno with technology that does this. As the updates progressed, the interior has become even bigger, having at least doubled compared to the first release.

  • The Law of Purple has Red's 'magic wardrobe', which has six floors; they include such things as a weight room, large, fun devices from various planets, a teleporter, and an Olympic-sized swimming pool. Red's renting the fifth floor out to a friend of his.
  • The ancient towers from the Talse Uzer Stories. They are already big on the outside, but on the inside, they are about six times as big as Earth's surface. Just how big it is. Tower of God shows the huge scale of things inside the towers pretty well.
  • Dominic Deegan used a spell for this early on.
  • The Inexplicable Adventures of Bob!:
    • Viceroy's Spire on the dragon planet Butane is bigger inside than out. Molly describes it as "All tesseracty and Whovian!"
    • This becomes a plot point when the Spire is destroyed. Rather than collapsing in on itself, its pieces expand away from each other—giving Voluptua a chance to survive rather than be crushed.
  • In Finders Keepers, we have Morlock's store. Among other things, it has a sign that reads: "Morlock "It's bigger on the inside.""
  • Keychain of Creation has a wagon that works like this, because Misho knows magic science.
  • The Ambis spaceships in Jix fit this trope.
  • The hospital in Superego is heavily implied to be this, along with other unsettling location tropes.
  • Hello With Cheese has a timeline for such objects — here and here.
  • In Mountain Time, it is implied that this is a trait of an ordinary human stomach.
  • In The End, the Axca, and presumably other Fiah ships, use this to a remarkable degree. On the outside, it's about the size of a short bus. On the inside, it would take days to traverse on foot, and the engine alone is the size of a football field.
  • In this Housepets! strip, even Zach, who's been in the temple in the back yard of Mr. Milton before, is absolutely stunned by how huge the place looks like from the inside, far in excess of the external dimensions.
  • The true power of Biscuit's oven in Homestuck. The entire Felt gang can fit inside it. Several things in the comic seem to work like this: Every iteration of a universe fits inside one giant frog that is very large but smaller than a Baby Planet, and the Troll universes were inside of Snowman's heart instead of (or alongside?) a frog. Then their are the characters' inventories...
  • At one point in Turnsignals On A Land Raider, a pack of Space Wolves are lured inside Cpl. Cavendish's WWI tank and get lost.
  • In Cobweb And Stripes, Betelgeuse uses his Reality Warper powers to make Lydia's luggage this way, so that she only needs to take one suitcase to college. She even invokes the trope when her father asks her why she's traveling so lightly.

    Web Original 
  • Whateley Academy has a number of mutants who can create such spaces/items. Moebius sells bat-belts with pockets that are larger on the inside, and it's Thuban's hidden power. Some students suspect Generator of being able to do this, but she's actually faking it with a variety of effects - despite owning a genuine TARDIS-purse that Thuban gave her.
  • Biscuits of Homestuck has an oven that can hold all of his colleagues and then some.
  • Red vs. Blue. Sister's ship was deliberately this, as it resembled a Pelican drop ship on the outside, but the inside was from a level set on a space station. Caboose says the trope title, and on the DVD commentary, Word of God says it was Rule of Funny.
  • According to one fan theory, hobbits' stomachs. That's how they out-eat everyone else.
  • The mansion of mystic hero Doctor Ka, from the Global Guardians PBEM Universe, has much, much more floor-space than its exterior would suggest. He needs the extra space to contain the angry ghosts...
  • In Blue Yonder, Jared thinks the building might be this -- he has some trouble accepting that it's just an apartment building.
  • Nella must have infused The Nostalgia Chick's fridge with TARDIS powers before she turned evil, 'cos the inside of that thing is huge. Doctor Tease actually gets blamed for it.
  • Homestar Runner: The King of Town's grill, where The Cheat lives, might be this. Or he just sleeps in a grill.
  • Apparently, the bag the user has in Neopets is this.
You carry with you, at all times, a bag. This bag holds all your items until you move them elsewhere. It's not a huge bag, but it seems to have more room on the inside.
  • Barbie's camper, house, and even her closet all exhibit this in Barbie: Life in the Dreamhouse. In fact her closet is so much bigger on the inside that it's literally possible to get lost in it for days simply trying to find one particular pair of earrings.
  • The Night Vale Municipal Dog Park is described this way by Intern Dana. She tells Cecil "If you stand still, the dog park seems to take up a single city block", yet she was able to follow the wall in a straight line for about two weeks while inside.
  • The Infinite Courtyard in Void Domain. A regular sized school building has an enclosed courtyard that is somewhere in the ballpark of ten square miles. There are a few full buildings built within, including a zoo and a greenhouse that are used for classes.
  • SCP Foundation
    • Multiple SCP objects have this quality, such as SCP-004-14 ("The 12 Rusty Keys and the Door"), SCP-100 ("Jamaican Joe's Junkyard Jubilee"), SCP-167 ("Infinite Labyrinth"), SCP-416 ("Infinite Forest"), SCP-509 ("Men Are Pigs"), SCP-648 ("The Labyrinth"), SCP-850 ("School of Fish") note , SCP-883 ("Extradimensional Beehive"), SCP-947 ("Their Own Fault") and SCP-1053 ("Overpopulation").
    • SCP-084 ("Static Tower"). From the outside, SCP-084's active area is a hemispherical dome shape 200 meters in diameter. On the inside the area appears to be unlimited. It is impossible to reach the Static Tower at the center of the area no matter how long you travel, and the grass plain that makes up most of the area appears to be infinite in size.
    • SCP-087 - The Stairwell. SCP-087 is located in a building. During one exploration the staircase inside SCP-087 went much further down than the physical limits of the building and the geological structure underneath it.
    • If SCP-184 ("The Architect") is placed inside a structure, its interior will slowly expand. At first the additional space will just be copies of and minor variations of the original structure, but as it continues the additional rooms and hallways become stranger and stranger.
    • SCP-261 ("Pan-Dimensional Vending"). Some of the items dispensed by SCP-261 have this quality.
      • A straw contained more Dr. Pepper than was physically possible - as much as a full sized bottle.
      • A tube contained an infinite amount of "Prangles" potato chips.
      • A cardboard box with the dimensions 5 x 5 x 10 cm contained 50 cubic meters of sand and rough diamonds.
    • SCP-343 ("God"). A Foundation Doctor noted that after SCP-343 renovated his cell, it seemed to be many times larger on the inside than when viewed from the outside.
    • SCP-413 ("Endless Garage"). Foundation investigation has established that the interior of SCP-413 is larger than the building's external dimensions.
    • SCP-432 ("Cabinet Maze"). SCP-432 is a steel storage cabinet. When the door is opened it leads to a huge underground labyrinth of steel-lined corridors.
    • SCP-455 ("Cargo Ship"). The ship's internal structures are larger than the external dimensions of the ship, such as a hall inside the ship extending 600 feet beyond the hull and the interior of the ship having 30 decks even though it should only have six.
    • SCP-487 ("The Impossible House"). The basement area is larger than it should be according to the house's blueprints. It's a maze of doors, hallways and rooms with no apparent pattern.
    • SCP-647 ("The Labyrinth"). The extradimensional maze SCP-647 is larger than the real world maze that contains it.
    • SCP-716 ("The Train"). From the outside SCP-716 appears to have a variable number of cars (from 8 to 20) at any given time. Upon being entered it appears to have an unlimited number of cars.
    • SCP-723 ("Aging Staircase"). An examination of the exterior of the tower in which SCP-723 is located indicates that SCP-723 extends further up than the exterior architecture should allow.
    • SCP-850 ("School of Fish"). SCP-850 appears to be a school of herring. Due to its Alien Geometries it contains an area of bent space inside of it which has a radius larger than 50 kilometers (and may be infinitely large).
    • SCP-855 ("The Film Hall"). While the Hall was in Surrealism mode it turned into a room which "stretched on for miles".
    • SCP-915 ("The Mechanotesseractic Computer"). SCP-915 is a metal cube 1.3 meters on a side. Anyone passing inside finds it to be much larger, and can wander around for months.
    • SCP-967 ("Infinite Scrapyard"). From the outside SCP-967 appears to be an scrapyard about 200 meters by 500 meters. On the inside it is much larger, being described as consisting of "trash as far as the eye can see".
    • SCP-1284 ("The Moon's Child Bride"). When SCP-1284-2 feeds itself to SCP-1284-1, SCP-1284-1's stomach interior size increases enough to hold all it's being fed, but the exterior dimensions of SCP-1284-1 do not change.
    • SCP-1351 ("Moebius Cave"). The dome in the center of the cave is 750 meters high, but based on its relationship to the surface above the cave it should only be 125 meters high.
    • SCP-1406 ("An Old Entity"). When a person is in the SCP-1406 building they will perceive that the inside of the building is slightly larger than the outside. This is due to their being influenced by the mind of the entity.
    • SCP-1555 ("Facility"). SCP-1555 is a series of underground tunnels inside a mountain. In one area there's a mile-wide lake which is much too big to fit inside the mountain.
    • SCP-1689 ("Bag of Holding Potatoes"). Inside the Bag, in addition to the huge number of potatoes there's a wall, floor and ceiling. Beyond the wall there's ground covered with dead grass, a tree and a twisted bicycle, indicating that it was a normal world (with human beings) that was suddenly buried in potatoes for some unknown reason.
    • SCP-1726 ("The Library and the Pillar"). The Library appears to be a small one story structure. Inside it is 14 square kilometers in area and a pillar inside it reaches up at least 12.8 kilometers.
    • SCP-1734 ("The Hole in the Deck"). The interior of the spatial anomaly ship goes down at least 70 meters, much further than the height of a regular frigate.
    • Inverted with SCP-1767 ("An Urban Slump"), which causes any affected building to be smaller on the inside.
    • SCP-1807 ("Home Sweet Okapi") is a dead okapi about 1 meter high. Inside it is an extremely cold (less than 2 square kilometer area).
    • SCP-1917 ("The Armour Maker"). SCP-1917 is an armored, mobile factory which is 55 meters x 35 meters x 25 meters in size. Inside it is an extradimensional space, a cube approximately 1 kilometer x 1 kilometer x 1 kilometer large filled with machinery.
    • SCP-1992 ("Indecisive Mobile Home"). When a person enters and moves through SCP-1993, imperfect copies of the person are created and move through SCP-1993 as well. As they do so additional rooms are created inside SCP-1993, increasing its interior space.
    • SCP-2249 ("The Failed Dreamland"). SCP-2249 is an extra-dimensional space that has a total area of about four square kilometers. It is found within a Russian hospital that is of considerably smaller size.
    • SCP-2282 ("Goat."). Before it was euthanized, SCP-2282's digestive tract had a volume of at least 17,000 cubic meters due to its non-Euclidean nature.
    • SCP-2334 ("Every Possible Photograph"). SCP-2334 is a salt mine in Utah that may hold every possible photograph of a specific size. The mine appears to be larger than the surrounding geology should allow.
    • SCP-2590 ("Trailer Trash"). When Alpha Squad followed SCP-2590 into an abandoned warehouse, it ended up going down a kilometer-long tunnel that doesn't exist in the real world.

    Western Animation 
  • In what is probably a Peanuts reference, Scooby-Doo's doghouse in A Pup Named Scooby-Doo looks like Snoopy's doghouse on the outside, but is an opulent mansion on the inside.
  • The goldfish-bowl castle in The Fairly OddParents!.
  • Futurama:
    • In one episode, Dr. Farnsworth creates a box containing a perpendicular universe - which contains a perpendicular Farnsworth, who has created a box containing the first Farnsworth's universe. They end up swapping boxes, so they have a box that contains their own universe.
    • The Planet Express ship and the building that houses it tend to have larger interiors if the plot demands.
    • Bender's torso is often bigger on the inside, as the plot or gag requires.
    • Bender also lives in a tiny locker, but Fry, some time after moving in with him, discovers "the closet" is actually one or more spacious rooms with sunlit windows. Bender finds it weird when Fry asks if he can live in there instead of the cramped main locker, but puts it down to human eccentricity. It's also possible the Robot Arms Apartments are just really oddly laid out.
    • Implied with Zoidberg's shell "house" in "The Deep South".
      Zoidberg: Say, robot, old buddy? Could you help me move a couch?
      Bender: Okay, but I'm not carrying it upstairs.
  • The Samurai Jack episode "Jack and the Farting Dragon" has a living creature like this. Jack has to crawl inside the dragon's mouth to find out what's causing its horrible stomach pains, and finds out that the inside of its body is a fairly large cave, seemingly much bigger than the dragon suggested at first.
  • The title building from Foster's Home for Imaginary Friends Possibly explained in the episode Dinner is Swerved, as the house may or may not be, itself, an imaginary friend. Madame Foster is certainly 'creative' enough to imagine one.
  • Dexter's Laboratory,
    • The lab was big enough to have "forgotten areas" resembling a jungle.
    • Parodied in an episode where Dexter shrinks the house to observe it inside his lab, leaving Dexter's lab of normal size on the inside, but a disembodied door on the outside.
    • Also parodied in an episode where Dexter draws a map of the house. Guess which is the smallest room.
    • Averted with his rival Mandark's lab, which is actually visible behind his house, complete with an entire Death Star.
    • In one of the Justice Friends segments, Major Glory and the Infraggable Krunk have to go into Valhallen's room. The three live in a standard size apartment, but Valhallen's room appears an entirely different dimension. When Krunk complained about how big it was compared to his room, Major Glory replied, "That's why he pays extra."
  • Earthworm Jim has an interesting example. In Assault And Battery, it's revealed that the inside of his suit is somehow as big as the inside of a large spaceship.
  • Pick any Hanna-Barbera show. The houses, be it the pre-fab caves on The Flintstones or the elevated apartments on The Jetsons, will look much larger on the inside thanks to Wraparound Backgrounds.
  • The title band in Hi Hi Puffy Amiyumi had a tour bus that was basically a large apartment.
  • Jimmy's "Hypercube" in Jimmy Neutron.
  • Niko And The Sword Of Light - The stomach of the Mogwamp counts.
  • In Planet Sheen, Boh-Rok the Destroyer's nostril: "It's a lot roomier in here than it looks from the outside. Some would even argue that it's impossible."
  • The Clubhouse in Monster Buster Club. Decrepit childhood hangout on the outside, freakin' Area 51 on the inside.
  • In an episode of The Magic School Bus, Ms. Frizzle turned the bus into a Suppose-O-Tron, but it seemed to retain its regular form. Then she led the class inside to reveal it now had a mammoth interior housing a gigantic laboratory.
  • In Ed, Edd 'n' Eddy, the Kanker Sister's trailer looks like a normal trailer on the outside, but inside it's a full two-story house, with staircase, large bathroom, and ginormous living room to boot.
  • In the Popeye cartoon Wolf in Sheik's Clothing Olive Oyl is kidnapped by a desert sheik and taken to his "humble abode", a tent. The tent is very small but when Olive looks inside she's shocked to find that it's a huge palace!
  • Pingu's igloo is very much like this.
  • The Ashleys' clubhouse in Recess on the outside it just looks like some old tires fused together but on the inside it has a game room, a study room, a tea party room, a TV room, etc.
  • Phineas and Ferb:
    • In one episode, the boys build a rocket in the backyard with a control center in a small shed. The shed comfortably seats a dozen girls acting as flight control. Phineas remarks that Ferb is just really good with the layout.
    • A later episode crossover with the Marvel Universe, repeats this again, with a reference to this Trope Namer, as "Just a little British sci-fi technology".
  • Sponge Bob Square Pants:
    • Various residences, such as SpongeBob's and Squidward's. Justified with Patrick's house in that it is mostly underground.
    • Taken Up to Eleven with Squilliam Fancyson's house. On the outside, his home looks like a tower around the same width as Squidward's house. On the inside, it is truly colossal, with dozens of floors and various huge rooms. The biggest of all is probably the rooftop garden which includes a giant statue of Squilliam's unibrow enirely made of gilded doorknobs.
  • Phoebe's house in Hey Arnold!. The boarding house where Arnold lives counts too.
  • Sharky's doghouse from Eek! The Cat; on the outside it looks like a regular doghouse, but on the inside it's a mansion.
  • Disney's House of Mouse:
    • The title nightclub. What actually gave this away was the fact that in the show's opening credits, one can easily tell that Willie the Giant is actually the same height as the building's exterior, but when we see the main dining area, one can tell that Willie can actually fit inside perfectly, and that the House of Mouse not only has a huge seating capacity — enough that (almost) every single animated Disney character can all fit inside the building at the same time — but also an extremely high ceiling just so even giant characters can fit inside as well.
    • And that's not even going into the Prop Room, which is practically bigger than the house itself. In fact, one can easily get lost unless he gets Pluto to guide him.
  • The Simpsons house remains fairly consistent on the inside (but the rooms do seem to move around as needed). It's the outside property that is 'bigger on the inside'. Bart's treehouse (which tends move around the yard) is as big as it needs to be on the inside. The backyard expands or contracts as the plot needs (such as when anti-crime cameras couldn't see it). Even the side yard expands when it needs to, such as when Bart and Lisa get into a confrontation with package delivery people.
  • Bubbie from The Marvelous Misadventures of Flapjack. She's blue and bigger on the inside.
  • Donald Duck's chalet (which for some reason resembled der Fuehrer's face) in Der Fuehrer's Face. This is most noticeable during the scene where a Nazi marching band can be seen plowing into said chalet and immediately dragging to the weapons factory to perform hard labor.
  • Astrotrain's interior seems to change size as the plot demands, being large enough to accomodate a fully combined Devastator with room to spare. Although Astrotrain himself changes size as the plot demands as well.
  • As a Doctor Who Shout-Out, The Falcon actually describes Thor's bedroom (which is a portal to Asgard) this way in Avengers Assemble.
  • Mr. Slave's insides in South Park is apparently bigger than it appears to be; he can shove Paris Hilton's entire body up his ass and not have his own body change in anyway. Likewise for Cartman, who was once able to fit all of Disneyland inside his rear.
  • Oggy's house from Oggy and the Cockroaches looks like a normal house, but on the inside it resembles a colossal mansion, with rooms the size of halls, ridiculously long corridors and stairs, and a ginormous library. Although it became Downplayed as of season 4.
  • Though not actually pointed out at any point, plenty of houses in My Little Pony: Friendship Is Magic are roomier than their petite appearances would suggest. In general, the exterior shapes don't match the interiors of the houses and buildings shown in the cartoon. With very few exceptions, one could fit the exterior of a building inside one of the inner rooms and have room to spare.
    • To name two examples: during the pilot, Pinkie Pie stuffed almost the entire population of Ponyville into a single room of Twilight's library, and the size of Sugarcube Corner doesn't match the inside (Pinkie Pie's room being the biggest offender).
    • In "The Crystal Empire", this is actually something of a crucial plot point. Twilight and Spike, upon entering King Sombra's former Evil Tower of Ominousness, end up having to navigate through his leftover security system filled with — among other things — tricky Pocket Dimension effects.
    • In Twilights Kingdom Part 2, the Round Table-like throne room in Twilight's new crystal tree-castle, and the corridor leading up to it, seem to be much too big to fit into the castle's exterior.
  • Blue's Clues: The house looks like a tiny cartoon house on the outside, but is much bigger on the inside, with a living room, kitchen, bedroom, and bathroom. Invoked by a visitor in one episode.
  • Steven Universe: Rose somehow created a large space inside Lion where she keeps important things like her sword and a videotape she left for Steven.
    • The temple which the Crystal Gems live in is also significantly bigger on the inside than the outside, despite already being huge on the outside. Rose's room alone is able to contain the entire town of Beach City that the Temple is located in, including a copy of the Temple (although it really shouldn't). Garnet explains in the episode Beach Party that the temple has magical extra-dimensional doors.
    • Lampshaded by Steven in Back to the Moon when it's revealed that the Rubies' Roaming Eye is also like this.
  • In episode 6 of Rainbow Brite the characters go into a UFO stranded in Rainbow Land. Rainbow notes it's larger than it seemed while Violet believes it is likely an advanced form of compression. The alien is clueless to why it's bigger on the inside, and doesn't even know what an engine is.
  • The clubhouse in Julius Jr. looks like a typical cardboard box pretend playhouse on the outside, but is huge on the inside.
  • Filbert's trailer in Rocko's Modern Life. In one episode he was able to fit a rather spacious photo studio, in another episode he had an absurdly large basement where he keeps aluminum cans to be recycled.
  • The Containment Unit in The Real Ghostbusters seem to be much, much, much bigger on the inside as is capable to have icebergs flouting around, thousands of ghosts (some of them gigantic), an atmosphere and enough space for humans to travel around.
  • In Infinity Train, Tulip is stuck on a seemingly endless train where each of the train cars have greater internal volume than their outside dimensions would imply.
  • Shimmer And Shine: The pet house Leah wishes for her pet fox Parisa is the size of a typical dog house but it's way bigger on the inside.

    Real Life 
  • The Copenhagen Tivoli Amusement park in Denmark uses this effect wonderfully — it appears far larger inside than outside. It is as close as it gets to this trope in real life. It is a magnificent illusion of the park being far larger than the city block containing it.
  • Likewise, the Pleasure Beach Blackpool. It's much smaller than most other amusement parks, but has just as many rides; at one point it had the second-greatest number of rollercoasters in the world (beaten only by the much larger Cedar Point, which had one more). The trick is that rollercoasters and such are layered over ground-based rides such as carousels.
  • Many Disneyland rides, especially the Haunted Mansion. The parks get around this issue by use of back lots hidden from public view, or making the rides partially underground. It's actually a little-known fact that Walt Disney World's parks, at least, are built well above ground level, with quite a bit of theatrics going into disguising this. This elevation provides space for the dark rides like the Haunted Mansion, as well as the Utilidors that allow cast members to travel around the park without being seen by the guests. (In practice, though, it really is underground; they just made it that way by raising the ground level rather than digging down.)
  • 10 Downing Street (the official residence of the UK Prime Minister). From the front it looks like an expensive but otherwise ordinary town house with maybe a dozen rooms total. It is actually three houses joined together (one of which was a substantial mansion in its own right) and has about 60 rooms. Andrew Marr on his Sunday morning show called it "the brick TARDIS".
  • Similar to another London landmark, The Abbey Road Studios. From the front it doesn't look like it could possibly hold three fully equipped recording studios that often host sessions for orchestras. The original 19th century townhouse is the facade, and the additions are all in back.
  • This is the entire concept behind "compressed folder" formats such as .zip, .rar, and .7z—taking a file or collection of files and jamming it into a single file that takes up a fraction of the space of the uncompressed files.
    • And taking things Up to Eleven, there are things like the infamous, which is a 42,374 byte file that expands to 4,503,599,626,321,920 bytes (that's 4.5 petabytes, or about four and a half million gigabytes).
    • The experimental drone music band Bull Of Heaven also made an 85 kb zip bomb that expands to 1.3 zetabytes (1.3 billion TB). The contained "song" is a series of duplicate files whose length adds up to over 10 billion years.
    • Finally, to top even that, we have things like, which could be considered as having an infinite size when expanded, since it contains itself.
  • In General Relativity, due to the curvature of space-time, the radius and volume of massive objects are larger than one would expect given their circumferencenote . For the Sun, this means the radius of the sun is about 2km larger, and the volume of the sun is about 0.0006% larger than it would be if it were massless. That means a spherical shell built around the Sun would be very slightly bigger on the inside than an identical shell built in empty space would be (source). This effect also gets larger the more massive and compact the object is. Black holes are such an extreme example that they may be only a few miles across, but have almost infinite volume.
  • The Hard Knocks "tactical laser tag" arena near the University of Central Florida is quite modest from the outside: a single polarized glass door with the logo and several posters advertising operating hours and special events, with the left and right taken up by generic office blocks. Upon entering, you find a full internet cafe (including a military firing range simulation) and a full warehouse and office space for combat. It's not until you enter the office arena that you realize that the "generic office blocks" were also bought out by Hard Knocks and made into the arenas.
  • President Thomas Jefferson designed his home, Monticello, to appear smaller when approaching it, making it look like a modest, almost quaint country home while allowing Jefferson to live in one of the finest stately homes on the continent.
  • Any regular theater goer will tell you that most theaters play this very straight—only a few doors for entry before being revealed to host a massive auditorium, orchestra pit, stage, and unseen backstage area.
  • Any interior space can be turned into an illusion of this trope by using objects to break up the space, in a way that limits vision. If you can't see what's on the other side of the shelf, you can't see how big the space is — so the room feels potentially bigger, even if you know the dimensions of the building. Thick forests work the same way.
  • Sports cars, especially supercars, are essentially a real-life inversion of this trope; they're usually big both on the size, price and performance, and look awesome, but they offer little to no room for even an extra kid, a pet or an extra luggage. Most can only sit two adults, and a few can bring in two more kids, but not adults. A cargo trunk full of items don't even work either.
    • However, McLaren F1 plays this straight, as its driver seat is in the middle, with a passenger seat on either side. That's one more person you can carry in it when compared to other supercars. This was even lampshaded by Rowan Atkinson, who also owned one and crashed and repaired it twice before sold it.
  • Some microcars, especially Japan's kei cars (light cars), are straight examples of this trope. Due to stringent measurements, exterior dimensions can't exceed the imposed limits and the designers find a way to maximize their interior space without exceeding the limits as well, so they adopted the not-so-dynamic "tall boy" designs which maximize the space by heightening the height. Thus, kei cars have shorter nose and taller body to maximize the interior space as well. Microvans (kei-sized vans) played this even straighter.

Alternative Title(s): Smaller On The Outside