Helmet Sizing Charts
Arai Helmet Sizing Guide
| Helmet Size |
Circumference
(approx. inches) |
Hat Size |
Centimeters |
| XS |
20 7/8 - 21 1/4 |
6 5/8 - 6 3/4 |
53-54 |
| S |
21 5/8 - 22 |
6 7/8 - 7 |
55-56 |
| M |
22 3/8 - 22 7/8 |
7 1/8 - 7 1/4 |
57-58 |
| L |
23 1/4 - 23 5/8 |
7 3/8 - 7 1/2 |
59-60 |
| XL |
24 - 24 3/8 |
7 5/8 - 7 3/4 |
60-61 |
| XXL |
24 3/4 - 25 1/4 |
7 7/8 - 8 |
62-63 |
Bell Helmet Sizing Guide
| Helmet Size |
Circumference
(approx. inches) |
Hat Size |
Centimeters |
| XXS |
21 1/4 |
6 3/4 |
54 |
| XXS |
21 5/8 |
6 7/8 |
55 |
| XS |
22 |
7 |
56 |
| S |
22 2/8 |
7 1/8 |
57 |
| M |
22 3/4 |
7 1/4 |
58 |
| M |
23 1/8 |
7 3/8 |
59 |
| L |
23 1/2 |
7 1/2 |
60 |
| L |
23 7/8 |
7 5/8 |
61 |
| XL |
24 1/4 |
7 3/4 |
62 |
| M3 Xtra |
25 1/8 |
8 |
64 |
| M3 Xtra |
25 1/2 |
8 |
65 |
| M3 Xtra |
25 7/8 |
8 1/4 |
66 |
| M3 Xtra |
26 1/4 |
8 1/4 |
67 |
| M3 Xtra |
26 3/8 |
8 1/2 |
68 |
HJC Helmet Sizing Guide
| Helmet Size |
Circumference
(approx. inches) |
Hat Size |
Centimeters |
| XXS |
20 - 20 1/2 |
6 3/8 - 6 1/2 |
51-52 |
| XS |
20 7/8 - 21 1/4 |
6 5/8 - 6 3/4 |
53-54 |
| S |
21 5/8 - 22 |
6 7/8 - 7 |
55-56 |
| M |
22 1/2 - 22 7/8 |
7 1/8 - 7 1/4 |
57-58 |
| L |
23 1/4 - 23 5/8 |
7 3/8 - 7 1/2 |
59-60 |
| XL |
24 - 24 3/8 |
7 5/8 - 7 3/4 |
61-62 |
| XXL |
24 3/4 - 25 1/4 |
7 7/8 - 8 |
63-64 |
| XXXL |
25 5/8 - 26 |
8 1/8 - 8 1/4 |
65-66 |
M2R Helmet Sizing Guide
| Helmet Size |
Circumference
(approx. inches) |
Hat Size |
Centimeters |
| XS |
21 1/4 - 21 7/8 |
6 3/4 - 6 7/8 |
54-55 |
| S |
22 - 22 1/2 |
7 - 7 1/8 |
56-57 |
| M |
22 3/4 - 23 1/8 |
7 1/4 |
58 |
| L |
23 1/4 - 23 3/4 |
7 3/8 - 7 1/2 |
59-60 |
| XL |
24 - 24 3/4 |
7 5/8 - 7 7/8 |
61-63 |
| XXL |
25 - 25 5/8 |
8 - 8 1/8 |
64-65 |
Stilo Helmet Sizing Guide
| Helmet Size |
Centimeters |
| XS |
53-54 |
| S |
55-56 |
| M |
57-58 |
| L |
59-60 |
| XL |
61-62 |
|
