Size Guide - Q36.5 - Helmets - Airbreaker
Q36.5 Helmet Size Guide
| International (INT) | S | M | L |
| Head circumference | 20"-21.6"/51-55cm | 20.4"-22.8"/52-58cm | 23.2"-24"/59-61cm |
How to measure my size?
Helmet sizes are based on head circumference. Measure your size by wrapping a measuring tape snugly around the widest possible circumference - from the most prominent part of the forehead (often 1-2 fingers above the eyebrow) around to the widest part of the back of your head. Measure 3 times, and take the largest number. Using the chart above, select your size.