AFX size chart shows medium at 7 1/4. The medium size is too small for my 7 1/8 head, and does not allow small glasses to be worn under the drop down visors. Two visors is a great idea, but the dark one creates a layer of astigmatism over already decrepit eyes: the clear is not much better. Used together, one can hardly see at all. Neither visor drops down easily; they require many 2-handed openings to wear out enough to maybe use. I would have appreciated a longer exterior visor. I bought at close-out price and still almost returned the helmet. Instead, I scraped out some of the padding in the back to make room for my head, and expect to only WISH for a drop down sunshade visor.
Helmet fits fine, feels good; until you start moving. The built in shields are terrible. If you pull it down far enough to cover your eyes you get a gap at the top. At 60 this thing will let so much wind through that you'll wish you had no shield at all. Not recommended, not even close.