Shoei Helmet Sizing

Manufacturer's Suggested Size Chart (Not a guarantee of fit)
SizeInchesCMHat Size
2XS 20(1/8) - 20(1/2) 51-52 6(3/8) - 6(1/2)
XS 20(7/8) - 21(1/4) 53-54 6(5/8) - 6(3/4)
SM 21(5/8) - 22 55-56 6(7/8) - 7
MD 22(1/2) - 22 (7/8) 57-58 7(1/8) - 7(1/4)
LG 23(1/4) - 23(5/8) 59-60 7(3/8) - 7(1/2)
XL 24 - 24(3/8) 61-62 7(5/8) - 7(3/4)
2XL 24(3/4) - 25(1/8) 63-64 7(7/8) - 8
3XL 25(5/8) - 26 65-66 8(1/8) - 8(1/4)