Giro Kids Helmet Sizing Chart
| Model | Size (CM) |
| Scamp XS | 45 - 49 cm |
| Scamp SM | 49 - 53 cm |
| Dime XS | 47 - 51 cm |
| Dime SM | 51 - 55 cm |
| Dime Universal | 50 - 57 cm |
| Tremor Youth | 50 - 57 cm |
| Model | Size (CM) |
| Scamp XS | 45 - 49 cm |
| Scamp SM | 49 - 53 cm |
| Dime XS | 47 - 51 cm |
| Dime SM | 51 - 55 cm |
| Dime Universal | 50 - 57 cm |
| Tremor Youth | 50 - 57 cm |