Oneal Men's Helmet Size Chart

SIZE INCHES EUROPE
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
XXL 24 7/8" 64
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