HJC FG-17 & FG-Jet Series Helmets

SIZE Inches Centimeters Hat Size
XS 21 1/4 - 21 5/8 54 - 55 6 3/4 - 6 7/8
S 21 5/8 - 22 55 - 56 6 7/8 - 7
M 22 1/2 - 22 7/8 57 - 58 7 1/8 - 7 1/4
L 22 7/8 - 23 1/4 58 - 59 7 1/4 - 7 3/8
XL 23 5/8 - 24 60 - 61 7 1/2 - 7 5/8
2XL 24 3/8 - 24 3/4 62 - 63 7 3/4 - 7 7/8
3XL 25 1/4 - 25 5/8 64 - 65 8 - 8 1/8
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