THH Helmet Size Guide

Wrap a measuring tape around the crown of your head, place it above your ears and eyebrows. Use the measurement to choose from the size ranges mentioned below.


SIZE Head Circumference 
(in cm)
S 55 - 56
M 57 - 58
L 59 - 60
XL 61 - 62
2XL 63 - 64
3XL 65 - 66