Arai Helmets
Click the more info link below to see the Arai Helmet Sizing Guide.
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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 |
