Sizing Chart

Helmet Size Hat Size Circumference (cm.) Circumference (in.)
X-Small 6 - 6 5/8 48 - 53 19" - 20.8"
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 3/4 58 - 62 22.8" - 24.5"