Need help choosing the right shape and size helmet for your own noggin?
Learn about the LidPicker!
We’ll help you find the right fit!
| Adult Helmets Size | Inches | Hat Size |
|---|---|---|
| X-Small | 20 3/4 – 21 1/4 | 6 5/8 – 6 3/4 |
| Small | 21 5/8 – 22 | 6 7/8 – 7 |
| Medium | 22 1/2 – 22 3/4 | 7 1/8 – 7 1/4 |
| Large | 23 1/4 – 23 5/8 | 7 3/8 – 7 1/2 |
| X-Large | 24 – 24 1/2 | 7 5/8 – 7 3/4 |
| 2X-Large | 24 3/4 – 25 1/8 | 7 7/8 – 8 |
Here is a link to sizing advice provided by ThorMX
