Stewie's head has the shape of an American football.[25][26] In the episode "Stuck Together, Torn Apart", a flashback shows Stewie's head was shaped as other babies shown on the show, until he hit his head on the ceiling while bouncing on the bed, and it flattened into the familiar football shape.[27] However, flashbacks in "Chitty Chitty Death Bang", show his head was already shaped like a football when he was born.[1]
The comic strip Jimmy Corrigan, the Smartest Kid on Earth also features an infant boy who has a football-shaped head with some hairs sticking out of it, talks in a very eloquent manner, fears his mother and constantly comes up with inventions to help him escape from her. The comic strip's creator, Chris Ware, started drawing Jimmy as early as in 1991. He remarks:
“ [The similarities are] a little too coincidental to be simply, well, coincidental".[28] ”
