Sizing Guide for Giro Helmets
How to Measure for Size
To determine the correct helmet size, wrap a measuring tape around the head, keeping the tape just above the ears and lever front to back. Once you've determined the measurement, you can use the size chart below as a guide.
If you have questions about the fit of a helmet, contact us.
| Size | IN | CM |
| XS | 17.75 - 19.25 | 45 - 49 |
| S | 19.75 - 20.75 | 49 - 53 |