Sizing Chart

Helmet Size Hat Size Circumference (cm.) Circumference (in.)
Small 6 3/8 - 7 51 - 56 20" - 22"
Medium 6 7/8 - 7 3/8 55 - 59 21.5" - 23"
Large 7 1/4 - 7 7/8 58 - 63 22.8" - 25"