How to measure: The circumference of your head should be measured at a point approximately one inch above the eyebrows and at the point on the back of the head that results in the largest possible measurement. You should take several measurements and use the largest measurement for helmet size purposes
+ Couloir | S | M | L |
| 51.5 - 55.5 cm | 55.5 - 59.5 cm | 59.5 - 61.5 cm | |
| 21 1/4 - 21 3/4 in | 21 3/4 - 23 1/2 in | 23 1/2 - 25 |
+ Trouble | S | M |
| 49.5 - 53 cm | 53 - 56.5 cm | |
| 19 1/2 - 20 3/4 in | 20 3/4 - 22 1/4 in |
| + Scott Shadow III Junior + WC pro + WC comp | XXS | XS | S | M | L | XL |
| 50 - 51.5 cm | 51.5 - 53.5 cm | 53.5 - 55.5 cm | 55.5 - 57.5 cm | 57.5 - 59.5 cm | 59.5 - 61.5 cm | |
| 19 3/4 - 20 1/4 in | 20 1/4 - 21 in | 21 - 21 3/4 in | 21 3/4 - 22 2/3 in | 22 2/3 - 23 1/2 in | 23 1/2 - 24 1/4 in |