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)

Shoei RF-1200 Helmet Information

Manufacturer's Suggested Size Chart (Not a guarantee of fit) 
SizeXSSMMDLGXL2XL
Shell SM MD LG XL
EPS Liner SM MD LG XL
Cheek Pad 39mm 35mm 35mm 35mm 35mm 31mm
Center Pad S13 S9 M9 L9 XL9 XL5
Cheek Pad Options 31mm, 35mm, 39mm, 43mm/ALL SIZES OF CHEEK PADS ARE INTERCHANGEABLE IN ALL HELMET SIZES