Bubba can crack his helmet, Giro's sizing in the gender neutral helmets has gotten huge! I have a big fat head, so my cowboy hats and helmets look sooooo out of proportion to my face. Anyway, when I cracked my last helmet trying to show off, I was pleased that the Giro Animas actually fit me in *gasp* a medium. Bill says they're sizing them a lot bigger now. Anyway, I'm sure there are bigger noggins than mine, but considering my hat is a 7 3/8 - 7 1/2 depending on brand, there's not much.