Smith Helmet Size Chart
Head Circumference: To determine the correct size, wrap a measuring tape around the head, keeping the tape just above the ears and level front to back. Once you've determined the measurement, you can use the chart here as a guide; however we recommend that you try helmets on prior to purchase to ensure the best fit and comfort.
Adult
| Size | S | M | L | XL |
| Head Circumference (cm) | 51-55 | 55-59 | 59-63 | 63-67 |
Youth
| Size | Youth Small | Youth Medium |
| Head Circumference (cm) | 48-53 | 53-58 |