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Measuring the circumference is an important step for choosing your helmet a incorrect size would result in a helmet or too wide or too tight and this would result in a reduction of driving comfort.
The measurement should be done using a centimetre and positioning it as in the photo around its head.
| Head circumference in CM | 50-51 | 52-53 | 54-55 | 56-57 | 58-59 | 60-61 | 62-63 | 64-65 |
|---|---|---|---|---|---|---|---|---|
| Men's helmet size | xxx | x | s | m | i | xl | xxx | xxxl |
| Head circumference in CM | 49-50 | 51-52 | 53-54 | 55-56 | 57-58 |
|---|---|---|---|---|---|
| Size female helmet | xxx | x | s | m | i |