I have an Akuma Stealth and the fit is quite different from other helmets. I wear an XL in Shoei, Arai, and Scorpion. The Akuma helmets run very snug and I ended up having to buy an XXL. The paint quality is unparalleled and gets comments everywhere I go. The batteries hold a charge very well and the light sure is helpful! My only complaint is the lack of room between the chinbar and my face - other helmets I have plenty of room but the Akuma fits much tighter, uncomfortably so at times. My advice: try it on before you buy!