Sizing Chart

Helmet Size Hat Size Circumference (in.) Circumference (cm.)
Small 6 5/8 - 7 1/8 21" - 22.5" 53.5 - 56.5
Medium 7 - 7 1/2 22" - 23.5" 56 - 59.5
Large 7 1/2 - 8 23" - 25.5" 59.5 - 64