This is supposed to be a one-size-fits-all but that's not the case. I'm 6'4" with a pretty big cone and I can't wear this cap. I bought one only a few years ago that I can set on two pins (on the adjustable strap) and wear just fine but I ordered another of the very same cap recently and now the caps are smaller (two pins is now too tight and you can't set the adjustable strap to one pin. That just never works). It's too bad - I really liked this cap.