Rockhard Helmets Size Chart

Size Inches Centimeters
XS 20 1/2 - 21 1/8 54
S 21 1/4 - 22 1/8 56
M 22 3/8 - 23 1/8 58
L 23 1/4 - 23 3/4 60
XL 23 7/8 - 24 3/4 62
2XL 24 7/8 + 64
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