Size Charts for Scott Helmets
Envy/Roam/Rove/Shadow III
| US Size | Centimeters | Inches |
| X-Small | 51.5 - 53.5 | 20 1/4 - 21 |
| Small | 53.5 - 55.5 | 21 - 21 3/4 |
| Medium | 55.5 - 57.5 | 21 3/4 - 22 1/2 |
| Large | 57.5 - 59.5 | 22 1/2 - 23 1/2 |
| X-Large | 59.5 - 61.5 | 23 1/2 - 24 1/4 |
| XX-Large | 61.5 - 63.5 | 24 1/4 - 25 |
Chase/Tracker/Anti/Jade
| US Size | Centimeters | Inches |
| Small | 51.5 - 55.5 | 20 1/4 - 21 3/4 |
| Medium | 55.5 - 59.5 | 21 3/4 - 23 1/2 |
| Large | 59.5 - 63.5 | 23 1/2 - 25 |
Rumble
| US Size | Centimeters | Inches |
| Small-Medium | 53.5 - 56.5 | 21 - 22 1/4 |
| Large-X Large | 57.5 - 61.5 | 22 1/2 - 24 1/4 |
Trouble / Bustle
| US Size | Centimeters | Inches |
| Small | 50 - 53.5 | 19 1/2 - 21 |
| Medium | 53.5 - 57.5 | 21 - 22 1/2 |
Shadow III Junior
| US Size | Centimeters | Inches |
| XX-Small | 50 - 51.5 | 19 1/2 - 20 1/4 |
| X-Small | 51.5 - 53.5 | 20 1/4 - 21 |
| Small | 53.5 - 55.5 | 21 - 21 3/4 |
| Medium | 55.5 - 57.5 | 21 3/4 - 22 1/2 |