Phineas and Ferb try to help Baljeet avoid great shame by enlarging his entry in a watermelon-growing contest. When Candace finds she's too short to audition to be a model for Flawless Girl cosmetics, she steals some formula to make herself taller, only to accidentally turn into a giant.

Meanwhile, Dr. Doofenshmirtz plans to sabotage the Tri-State Midsummer Fair by dousing it in the scent of dirty diapers with his "Smell-inator".
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!!Tropes:
* AnAesop: On fashion standards and feeling good about oneself.
* ArtisticLicensePhysics: If the universe actually grew as it did in the episode, the enlargement of the sun coupled with the lack of distance between planets would cause the solar system to burn up like ants under a magnifying glass. In addition, gravity would be increased to the point where it would cause catastrophic destruction. [[MST3KMantra Then again, it's a cartoon.]]
* AttackOfThe50FootWhatever: As indicated by the title. Candace uses a growth elixir the boys made in order to grow an extra two inches; it makes her gigantic instead.
* BatSignal: "It's the Baljeet Signal!"
* BigHeadMode: At one point, Candace has an enormous head in a form known as "Bobble Head Candace".
* BrickJoke: Perry enters his lair through the neighbor's koi pond, but accidentally takes the koi with him. Major Monogram suggests giving them hats and making them agents to avoid a lawsuit. Later, the koi help Perry defeat Doof.
* BringMeMyBrownPants: Once Baljeet's watermelon becomes gigantic, he says, "I am going to need a crane! And a new pair of pants."
* ChekhovsGunman: At the beginning of the episode, Perry the Platypus enters O.W.C.A. headquarters through a secret entrance in his neighbors' koi pond, bringing three fish inside with him. To avoid a lawsuit, Major Monogram decides to give the fish hats and make them agents. Later, as Doofenshmirtz is about to activate the Smell-inator, the three fish land on Doofenshmirtz's head (soaking him with water in the process) and free Perry the Platypus from his trap.
* CuteGiant: Candace when she becomes 50 feet (15 meters) tall.
* DressedInLayers: P.P. Otter just happens to be wearing a gorilla suit under his tuxedo.
* TheFreakshow: P.P. Otter (obviously an {{Expy}} of P.T. Barnum) is the master of ceremonies for what the series refers to as an "oddball show", since calling it a "freak show" would spark controversy.
* GiantsDropletHumansShower: Candace cries a SingleTear when she thinks she has become a freak. Because of her size, the boys use an umbrella to prevent themselves from getting soaked.
* GiantWoman: Candace becomes one after using the growth elixir.
* HeightAngst: Candace doesn't take it well when she is told that she is two inches too short (or, as she puts it, "two inches too ugly") to be a Flawless Girl.
* IAmAMonster: Candace considers herself this after she becomes gigantic.
* ImpossiblyCompactFolding: Ferb's chemistry set, which is small enough to fit inside a suitcase, expands into a full-sized laboratory.
* KingKongClimb: {{Inverted|Trope}}. P.P. decides to have Candace climb the Doofenshmirtz Evil Incorporated building while ''he'' is wearing a gorilla suit. P.P. {{lampshade|Hanging}}s this, calling it "a reversal of a familiar theme".
* LamePunReaction: Candace is unamused when Phineas introduces her as his "''big'' sister".
* MadLibsCatchphrase:
** ''(Perry stumbles in playing a banjo)'' A banjo-playing platypus? ''(puts on fedora)'' ''PERRY'' THE BANJO-PLAYING PLATYPUS!??!!
** "Giant Candace is out, PEACE!"
* MobileShrubbery: Giant!Candace hides in a tent and crawls towards Phineas' booth with the tent still over her back.
-->'''Candace:''' Phineas?\\
'''Phineas:''' Yes, strange talking tent?
* NeverMyFault: Candace believes that the boys were responsible for making her gigantic, even though she was the one who used the growth elixir on herself.
* NotSoDifferentRemark: Candace observes that the fashion industry and freakshow runners aren't too different from each other since they both exploit people's body image issues for money.
* RefugeInAudacity: The ResetButton for this episode uses Doof's Inator per the norm and plays on the fact that Phineas and Ferb's growth elixir only works on something once. This time, Doof's Inator of the Episode douses the ''entire universe'' with it, returning everything back to relative size to Candace.
* ShoutOut:
** Baljeet asks for help using a holographic message, just like Princess Leia in ''Film/ANewHope''.
** The title is a reference to ''Film/AttackOfThe50FootWoman''.
** Candace [[Franchise/KingKong climbs the Doofenshmirtz Evil Incorporated building holding P.P., who is wearing a gorilla suit]].
* SourceMusic: Doof is recording the "Doofenshmirtz Evil Incorporated" jingle when Perry enters. Also doubles as LeftTheBackgroundMusicOn.
-->'''Singers''': ''Doofenshmirtz Evil Incorporated...''
-->'''Doofenshmirtz''': What the?! Oh, the festival is so loud I can't even hear my own Evil Jingle. ''(to the singers)'' Okay, guys, take it from the top. Louder!
-->'''Singer''': A-one, two...
-->'''Singers''': ''Doofenshmirtz Evil Inco—''
-->''(Perry crashes in)''
-->'''Doofenshmirtz''': Oh! What now?
* StatusQuoIsGod: Doof accidentally uses Phineas and Ferb's growth elixir in his Smell-inator on the entire universe making everything in the universe bigger, thereby causing Candace and Baljeet's watermelon to be normal-sized by comparison.
-->'''Candace''': I'm back to normal!
-->'''Linda''': [[DeadpanSnarker "Normal" being a relative term]].
* TemptingFate: As Doofenshmirtz prepares to fire the Smell-inator, he says, "You hear that, Perry the Platypus? That is the sound of smell. Nothing can stop me now!". Immediately afterwards, the three koi fish arrive and land on his head.
* UnderestimatingBadassery: Candace assumes that her brothers' growth elixir only makes whatever it's used on grow a few inches when Baljeet's watermelon slightly increases in size. This is despite her knowing that Phineas and Ferb regularly accomplish the impossible with big and grand inventions.
* YouMustBeThisTallToRide: A non-ride variant occurs with the Flawless Girl auditions. As the song indicates, the Flawless Girl is never under 5'10" (1.77 m), and Candace is 5'8" (1.72 m).
-->'''Blanca Dishon''': Aren't you a little short to be a Flawless Girl?
-->'''Candace''': Well, I—
-->'''Blanca Dishon''': Yes. Yes, you are.