iOutdoor Bike Helmet Size Chart
1. Achieve the perfect fit by measuring your head circumference correctly.
2. Watch the video below to see how to measure your head correctly.
3. VIDEO: How To Measure For A Bike Helmet
4. On the chart below, find the helmet model that you are interested in, then find your head measurement to see which size you need.
iOutdoor Bike Helmet Size Charts
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” |