Sizing Chart

Helmet Size Hat Size Circumference (cm.) Circumference (in.)
X-Small 6 3/8 - 6 3/4 51 - 54 20" - 21.2"
Small 6 3/4 - 7 1/8 54 - 57 21.2" - 22.4"
Medium 7 - 7 1/2 56 - 59 22" - 23.2"
Large 7 3/8 - 7 7/8 59 - 63 23.2" - 24.8"
X-Large 7 3/4 - 8 1/8 61 - 65 24" - 25.6"