Size Guide - Rudy Project - Helmets - Skudo - Nytron - The Wing
Rudy Project Helmet Size Guide
| International (INT) | S/M | L |
| Head circumference | 21.7"-22.8" | 23.2"-24.0" |
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.