Sizing Information
If you are unsure about your size, compare your body measurements to the size charts provided to determine the correct fit. These charts will give you a good idea of the size to order, but be sure to read special sizing information that may accompany an item description. Some merchandise dimensions may vary from the averages charted here.
With tape level, measure the widest point of your head, approximately 1 inch above your eyebrows.
SE3 / AIR Helmets
| Helmet Size |
Hat Size |
CM |
Inches |
| X-Small |
6-5/8 to 6-3/4 |
53 to 54 |
20-7/8 to 20-1/4 |
| Small |
6-3/4 to 7 |
54 to 56 |
21-1/4 to 22 |
| Medium |
7 to 7-1/4 |
56 to 58 |
22 to 22-3/4 |
| Large |
7-1/4 to 7-1/2 |
58 to 60 |
22-3/4 to 23-5/8 |
| X-Large |
7-1/2 to 7-3/4 |
60 to 62 |
23-5/8 to 24-1/2 |
| XX-Large |
7-3/4 to 7-7/8 |
62 to 63 |
24-1/2 to 24-7/8 |
| Shell Sizes: |
XS-L |
XL-XXL |
EPS Sizes: |
XS-S |
M-L |
XL-XXL |
*Headliners and Cheekpads can be interchanged within the same EPS size. SE3 Cheekpads are interchangable through the entire size range.
D3 Helmets
| Helmet Size |
Hat Size |
CM |
Inches |
| X-Small |
6-1/2 to 6-5/8 |
52 to 53 |
20.5 to 20.9 |
| Small |
6-3/4 to 6-7/8 |
54 to 55 |
21.3 to 21.7 |
| Medium |
7 to 7-1/8 |
56 to 57 |
22 to 22.4 |
| Large |
7-1/4 to 7-3/8 |
58 to 59 |
22.8 to 23.2 |
| X-Large |
7-1/2 to 7-3/4 |
60 to 62 |
23.6 to 24.4 |
| XX-Large |
7-7/8 to 8-1/8 |
63 to 65 |
24.8 to 25.6 |
| Shell Sizes: |
XS-L |
XL-XXL |
EPS Sizes: |
XS-S |
M-L |
XL-XXL |
*Headliners and Cheekpads can be interchanged within the same EPS size.
D2 Helmets
| Helmet Size |
Hat Size |
CM |
Inches |
| XS/SM |
6-1/2 to 6-7/8 |
53 to 55 |
21 to 22 |
| MED/LG |
7 to 7-3/8 |
56 to 59 |
22.4 to 23.3 |
| XL/XXL |
7-1/2 to 7-3/4 |
60 to 62 |
23.7 to 24.5 |
| Shell Sizes: |
XS-S |
M/L-XL/XXL |
EPS Sizes: |
XS-S |
M-L |
XL-XXL |
*Interiors cannot be interchanged, since they already combine sizes.
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