Use the following size chart as a guide in choosing the correct helmet size. Wrap a cloth measuring tape around your head just above your eyebrows. Pull the tape comfortably snug and read the length. Please note that sizing information is provided by the manufacturer and does not guarantee a perfect fit.
| Helmet Size | Inches | Centimeters | Hat Size |
| XS | 20 7/8 – 21 1/4 | 53 – 54 | 6 5/8 – 6 3/4 |
| Small | 21 5/8 – 22 | 55 – 56 | 6 7/8 – 7 |
| Medium | 22 3/8 – 22 3/4 | 57 – 58 | 7 1/8 – 7 1/4 |
| Large | 23 1/8 – 23 1/2 | 59 – 60 | 7 3/8 – 7 1/2 |
| XL | 24 – 24 3/8 | 61 – 62 | 7 5/8 – 7 3/4 |
| XXL | 24 3/4 – 25 1/8 | 63 – 64 | 7 7/8 – 8 |