[[HormoneAddledTeenager Puberty can do weird things to kids.]] Hair starts growing everywhere, attraction to other people starts popping up, and, well, you grow up. Some people don't just grow up, though; they get BIG.

This trope describes characters who are seen for the first time after an extended period or {{time skip}}, and have grown a few inches up (or out, or both, or a LOT). It usually happens to the guys, and is usually meant to accentuate the amount of time that has passed: the little kid you used to noogie is now big enough to knock you out with one punch. Sometimes, they replace TheBigGuy of the last generation. Can be used as a gag if the smallest kid is the one who grew the most.

{{Pint Sized Kid}}s tend to end up under this {{trope}} due to the major size gap between them and grownups. Compare to SheIsAllGrownUp and BreastExpansion.

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!!Examples:

[[AC:{{Anime}} and {{Manga}}]]
* Coby of ''Manga/OnePiece'' is almost unrecognizable after training under Vice Admiral Garp.
* Simon of ''Anime/TengenToppaGurrenLagann'' ends up taller than his mentor and "big bro" Kamina after the mid-series time-skip.
* ''Manga/DragonBall'': Goku starts out rather runty. Thanks to [[BigEater his appetite]], that doesn't last long.
** Aversion: Kuririn manages to stay the same height across 3 different series after his growth spurt.
* ''Manga/{{Bleach}}'': Captain of the 7th Squad, Komamura Sajin, appears to be about the height of his friend, Tosen Kaname, when they first meet, if much wider. By the time the main storyline starts... Well, uh...
* Momiji from ''Manga/FruitsBasket''. He was originally a short, [[DudeLooksLikeALady feminine looking]] boy who seemed [[OlderThanTheyLook too young]] to be a high schooler but late into the manga he's shown tall and {{bishonen}}. He still keeps his bunny backpack though.
* Anyone recall that [[TheLoad runty, skinny, and generally useless]] kid Raki from ''Manga/{{Claymore}}''? [[BadassNormal Guess who]] is still looking for Clare after the TimeSkip.
* In ''Anime/SailorMoon'' Usagi's little brother Shingo has something of a growth spurt between the first and second seasons, going from around half her height to only a little shorter than her (she even comments at one point that it's getting harder for her to physically intimidate him). The practical reason for this is to make him look older than the newly introduced Chibiusa (who also takes over his role as AnnoyingYoungerSibling while he gets a little CharacterDevelopment).
** Chibiusa herself plays this trope straight in the anime version. She got bigger between the seasons; in the manga, she had a physically PlotRelevantAgeUp.
* Sakura is a bit surprised to find out that Manga/{{Naruto}} has grown taller than her in the 2 1/2 years he was gone (he's actually the second-tallest of the Konoha 11 now as opposed to being the shortest).
* After a 3 month timeskip in ''Manga/FullmetalAlchemist'', Ed grew noticeably taller (he also did so in the first anime's movie). He still has his BerserkButton though, so tell him that at your own risk. By the end of the manga he's noticeably taller than Winry, compared to the beginning where he was far shorter than her.
** In the [[Anime/FullmetalAlchemist first anime]] though he's still considerably short, barely being taller than his biologically fourteen year old brother and apparently still shorter than Winry. He's considerably shorter than Noah.
** The physically thirteen Alphonse spends most of ''Anime/FullmetalAlchemistTheConquerorOfShamballa'' spends most of the movie shorter than his eighteen year old brother. After a small timeskip at the end we see Al, now with shorter hair, next to Ed and they're the same height. Edward is short for a man while Al grows up to tower over his brother according to the "Kids" ova.
* Shuuichi and Riku from ''Manga/WanderingSon''. Shuu started growing several inches during the high school chapters, being taller than almost all the girls. Riku even notices she has grown taller than him when originally he had to look down at Shuu.
* Riku from ''Manga/VenusVersusVirus'' starts out a short elementary school boy at the start of the manga but by the last chapter he's almost as tall as his sixteen ([[VagueAge or so]]) sister and taller than several high school freshman.
* Ayato Kamina undergoes a slight growth spurt over the course of ''Anime/RahXephon'', starting just a smidge shorter than Haruka (166 vs 167cm) and ending up several inches taller than her even in heels. Haruka brings attention to this near the end of the series [[spoiler:just before confessing to him]].
-->'''Haruka:''' "You passed me."
* In ''Anime/DigimonAdventure'', Takeru and Hikari were a few years younger than the other kids and about half their height. Come ''Anime/DigimonAdventure02'' and they're the same age and height as the older kids were back then. (In turn, the older kids are a bit taller too, but the difference isn't nearly as drastic.)
* In ''Manga/{{Planetes}}'', Hachimaki's teenage brother Kyutaro becomes [[BigLittleBrother larger than him]] after he returns from outer space, some months to a year later.
* A few examples in ''{{Manga/Saki}}''.
** In the Achiga-hen spinoff, Ako, as an elementary schooler, is slightly shorter than her friend and year-mate, Shizuno. After they go through separate middle schools, however, Ako is taller and bustier than Shizuno, much to Shizuno's dismay.
** In the main series, flashbacks indicate that Kasumi of the Eisui team was short and flat-chested as a young girl. By the time in which the story takes place, though, she's relatively tall and [[GagBoobs has the largest breasts of all the high-schoolers in the series]]
* ''Anime/MagicalGirlLyricalNanoha'' fans had grown to love the 9 year old Nanoha Takamachi and her friends. Cue it's third season, set 10 years later, with fully grown characters.
* ''Manga/BokuraNoHentai'':
** Over the summer Satoshi hit a growth spurt. He had to quit his {{crossdresser}} ways as he couldn't wear his sisters clothes anymore.
** Osamu begins growing noticeably as well. The boy he has affections for calls him disgusting now that puberty has made him taller, his voice deeper, and his body left soft. [[spoiler:After that they stop talking but Osamu keeps crossdressing]].

[[AC: Film]]
* This is lampshaded at the beginning of ''Film/DiaryOfAWimpyKid'' in which Greg doesn't recognize any of the background characters, because of everyone going through puberty over the summer.

[[AC:Live Action TV]]
* All the Sutton kids in ''Series/LincolnHeights'' grow a little, but Tay is the most noticeable, and he becomes far less wimpy as a result.
* The writers of ''Series/{{Lost}}'' found out the hard way why you can't have a kid in a show in which one season equates to about a month of in-universe time. [[spoiler:Walt had to be written out for that reason.]] When Locke saw a vision of Walt, he was [[LampshadeHanging "taller"]], with no in-universe explanation as to why.
* In an episode of ''Series/{{Taxi}}'' Bobby, a cabdriver/actor, goes to Louie's high school reunion in his place, pretending to be him in order to get back at all the kids who teased Louie in school. Bobby!Louie claims he "shot up" in college.

[[AC:{{Literature}}]]
* In T. A. Barron's ''Literature/TheLostYearsOfMerlin'', Shim, the very, very, ''very'', small giant [[spoiler:commits suicide by jumping into [[ArtifactOfDoom The Cauldron of Death]], which breaks, comes back to life, and grows to be the largest giant.]]
* The protagonist of Creator/NeilGaiman's ''Literature/AmericanGods'', Shadow, starts out as a nerdy runt, blows up over the summer, and decides to [[ObfuscatingStupidity hide his intelligence]] after finding out that people expect someone of his size to be a [[DumbMuscle dumb jock-type]].
* ''Literature/{{Dune}}'': When he's first introduced as a fifteen year old, Paul Atreides is described as looking small and young for his age. After the TimeSkip, he's grown to be very tall and imposing.
* Tigerstar of ''Literature/WarriorCats'' had been the runt of his litter until getting older. Not only did he get older and bigger, but he also became a ''giant'' among the Clan cats. It appears that his sons Bramblestar and Hawkfrost share their father's growth spurt as well.
* ''Literature/CliffordTheBigRedDog''. Pretty much the epitome of this trope.
* In the Literature/{{Redwall}} book The Taggerung, before the time skip, Mhera is very young, half the size of her mother. Deyna is just a baby. After the time skip (Arguably implied to be the equivalent of fifteen years) Mhera is taller than her now slightly shrunken mother, and [[spoiler: Deyna towers over both of them, not to mention very muscular seeing as he trained his entire life as the prophesied (second) greatest warrior who ever lived]]
* In ''DiaryOfAWimpyKid - The Ugly Truth'' the plot features around puberty, and the fact Rowley is maturing faster than Greg. It ends with Greg realizing he could use Rowley's puberty to his advantage. In which he draws a 10-foot Hulk-like Rowley about to cream some bullies.
* ''The New Adventures of Elektronik'' by Yevgeny Veltistov take place a year or two after ''Electronic Boy from The Portmanteau''. In the original story, the boy robot Elektronik looks identical to Sergey, a seventh-grader. By the ''New Adventures'', there is a noticeable difference between the two, as Sergey is now taller, allowing the others to easily distinguish the boy from the android. On the other hand, Elektronik is clearly the more mature one.

[[AC: Newspaper Comics]]
* ComicStrip/{{Garfield}} has a dream where Nermal after years of abuse comes back for revenge, and is massive! Cue Garfield waking up and giving his breakfast to the confused Kitten. Though it's been implied Nermal is really an adult which means he won't grow.

[[AC:VideoGames]]
* An actual plot point in ''VideoGame/TheLegendOfZeldaOcarinaOfTime'', as Link time-skips seven years and grows up.
** From the same game, Princess Ruto goes from a bratty little [[FishPeople fish-girl]] to a tall, surprisingly stacked CuteMonsterGirl.
* Sothe between ''Franchise/FireEmblem: [[VideoGame/FireEmblemTellius Path of Radiance]]'' and ''[[VideoGame/FireEmblemTellius Radiant Dawn]]''.
** Ike and Boyd both grew a lot taller between the games as well. Many other characters even comment on the radical height increases with all three characters throughout the second game. Tormod's comments to Ike is the most amusing of them all.
* In ''VideoGame/SonicGenerations'', through the game's use of TimeyWimeyBall, it turns out that the original tubby, black-eyed design for Sonic from the first 3 games and ''[[VideoGame/SonicTheHedgehogCD CD]]'' was a pre-pubescent version of the hedgehog, while the modern sleek, green-eyed design is him post-puberty.
** In ''VideoGame/SonicBoom'', Knuckles has inexplicably ''doubled'' in height and ''seriously'' bulked up. (Note that ''Boom'' is an AlternateContinuity, so where it branches off from the mainline canon, if at all, is unknown.)
* Somehow, Calli from ''VideoGame/FinalFantasyX'' goes from about eight to ''seventeen'' in the course of two years.
* Inverted in ChronoTrigger as this trope plays out of order, Magus is a very tall, stoic, very attractive looking wizard. Later on you time travel to the past and meet his child self. Who is like all kid sprites in the game very small.

[[AC:Webcomics]]
* Snails from ''Blog/SliceOfLife'', who went from a lanky foal in [[WesternAnimation/MyLittlePonyFriendshipIsMagic the cartoon]] to a muscular motorcycle-riding jock.

[[AC:Visual Novels]]
* Battler from ''VisualNovel/UminekoWhenTheyCry'' notes that he recently underwent a growth spurt that left him noticeably taller than just about everyone else in his extended family. He's a bit embarrassed that they all feel the need to comment on it.
* In the Unlimited Blade Works route of ''VisualNovel/FateStayNight'', Shirou (5'6") complains a bit about being on the small side. As [[spoiler:the reveal that the 6'2" and very muscular Archer is a FutureBadass version of Shirou]] shows, he has one hell of a growth spurt to expect in the upcoming years.

[[AC:WesternAnimation]]
* An unlikely case, Dr. Zoidberg of ''WesternAnimation/{{Futurama}}''. Upon returning to his home planet for mating season, he visits the tide pool where he grew up, and "meets" a small crab-like animal named Vinnie who apparently had bullied Zoidberg when they were younger. Zoidberg promptly taunts him about being the tough guy now and then eats him.
* Enzo from ''WesternAnimation/ReBoot'' got '''huge''', post TimeSkip. He went from half the size of Bob to a head taller and far more muscular than Bob. Bob even points out the size change when Enzo is about to [[RunningGag run into Bob]] like Enzo did back in season 1.
-->'''Bob:''' "Whoa! I think you're a little too big for that".
** He's bigger than ''Megabyte,'' Thank you, puberty!
** Becomes endlessly awkward when [[spoiler: the system reboots bringing back an exact copy of kid Enzo, in the same room with huge/buff/adult Enzo "Kid Enzo: Who's that big ugly green guy?"]]
* In one episode of ''WesternAnimation/KingOfTheHill'', Joseph comes back from summer camp having undergone a serious growth spurt, gaining a very deep voice, and having grown some facial hair. Bobby spent most of the episode envious despite having spent his summer doing grown-up things with his grandma at a retirement community. Joseph still ended up being incredibly immature either way, though.

[[AC:TruthInTelevision]]
* It's not at all uncommon for adolescents and teenagers to go though dramatic growth spurts in a very short period of time. Over the course of a single year a kid can go from the shortest member in their family to as tall or even taller than their parents.
* Creator/PatrickWarburton, famous for playing characters like Series/TheTick, [[WesternAnimation/TheVentureBrothers Brock Samson]], and [[Disney/TheEmperorsNewGroove Kronk]] has said that he was a runty weakling in high school. He sure isn't now!
** While there's no particular reason a voice actor should in any way physically resemble the character they're voicing, it's worth noting that Warburton played the ''live-action'' version of The Tick. He looks pretty much like you'd expect a guy who sounds like [[WesternAnimation/FamilyGuy Joe Swanson]] to look.
* Anthony Michael Hall, who convincingly played small, geeky characters early on, then went on to playing convincingly menacing hulks.

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