Helmet Size Guide
How to measure your head
Using a soft tape measure or a piece of string and a ruler, wrap it around your head approximately 2.5cm (1 inch) above your eyebrows and above your ears. Keep the tape level all the way around. Take the measurement in centimetres. If you only have inches, multiply by 2.54.
Helmet sizing varies more between brands than clothing does. Shoei runs slightly smaller than Caberg at equivalent sizes. If you're on the boundary between two sizes, try both before buying.
General helmet sizing, head circumference in cm
| Size | cm | inches | Shoei | Caberg | Airoh |
|---|---|---|---|---|---|
| XS | 53–54 | 20¾–21¼ | XS | XS | XS |
| S | 55–56 | 21¾–22 | S | S | S |
| M | 57–58 | 22½–22¾ | M | M | M |
| L | 59–60 | 23¼–23½ | L | L | L |
| XL | 61–62 | 24–24½ | XL | XL | XL |
| XXL | 63–64 | 24¾–25¼ | XXL | XXL | XXL |
| XXXL | 65–66 | 25½–26 | XXXL | XXXL | XXXL |