My hat size, helmet also is 7 5/8 not XXL. Not all helmet and hat sizes in the XL and XXL are the same. My current helmet is a Bell open face, I wear glasses and my class does not require a close face helmet, try different brands and sizes on, you do not want a lose helmet on your head in a crash Buy one that is snug and will become very snug once you fasten the chin strap I have to pull the sides open on mine to be able to slide it on to start with