O'Neill Adults Hood Size Guide
Metric sizing
| Size | Neck (cm) | Head (cm) |
|---|---|---|
| Extra Small | 36-38 | 48-53 |
| Small | 37-39 | 51-56 |
| Medium | 38-41 | 53-58 |
| Large | 39-42 | 56-61 |
| Extra Large | 41-43 | 58-64 |
| 2XL | 42-44 | 61-66 |
Imperial sizing
| Size | Neck (in) | Head (in) |
|---|---|---|
| Extra Small | 14-15 | 19-21 |
| Small | 14½-15½ | 20-22 |
| Medium | 15-16 | 21-23 |
| Large | 15½-16½ | 22-24 |
| Extra Large | 16-17 | 23-25 |
| 2XL | 16½-17½ | 24-26 |