iOutdoor Bike Helmets Standard Sizing
| Model | S | M | L |
|---|---|---|---|
| Multi-Sports Safety Helmet | 48 – 54cm | 55 – 57cm | 58 – 61cm |
| 18.9″ – 21.2″ | 21.3″ – 22.4″ | 22.5″ – 24″ | |
| Kids Bike Helmet | 48 – 54cm | 55 – 57cm | 58 – 61cm |
| 18.9″ – 21.2″ | 21.3″ – 22.4″ | 22.5″ – 24″ |
iOutdoor Bike Helmets Universal Sizing
| Model | Universal Size |
|---|---|
| Lightweight Adult Bike Helmet | 56 – 64cm |
| 22″ – 25¼” |
