Although all 5 of my current helmets are XL (pista gp, corsa, bell star, hjc and x12) the agv helmets fit superrr tight....almost uncomfortable. Not even sure an XXL would be comfortable either, just cuz of the way it fits. My X-11 Shoei I used to have was an L and it was just fine. Very comfortable. My x12, bell star and hjc fit very comfortably so I can see how multiple sizes may fit someone based on brand. If it wasn't for the stylish look of both my AGV's, I'd never buy an AGV.