Helmet Size & Fit Guide
Helmet Size & Fit Guide
Getting the right fit is essential for safety and comfort. Follow the steps below to find your perfect size before ordering your custom KONG30 lid.
Step 1: Measure Your Head
You'll need a flexible measuring tape (or a piece of string and a ruler).
- Wrap the tape around your head approximately 1 inch (2.5 cm) above your eyebrows and ears — this is the widest part of your head.
- Keep it level all the way around.
- Note the measurement in both centimeters and inches.
- Measure twice to confirm accuracy.
Tip: Have a friend help for a more accurate reading.
Step 2: Find Your Size
| Head Circumference (cm) | Head Circumference (in) | Helmet Size |
|---|---|---|
| 55 – 56 cm | 21.75" – 22" | M |
| 57 – 58 cm | 22.5" – 22.75" | L |
| 59 – 60 cm | 23.25" – 23.5" | XL |
| 61 – 62 cm | 24" – 24.5" | 2XL |
If your measurement falls between two sizes, we recommend sizing up for comfort, or contact us and we'll help you choose.
Step 3: Confirm a Proper Fit
When trying on your helmet (or when it arrives), check these fit indicators:
- Snug but not tight: The helmet should sit level on your head without rocking side to side or front to back.
- Cheek pads: They should touch your cheeks firmly without causing pain — slight pressure is normal for a new helmet and will break in over time.
- No forehead gap: The front edge should sit about 1 inch above your eyebrows. If you can fit more than two fingers between the rim and your brows, it's too loose.
- The shake test: Put the helmet on and move your head side to side and up and down. Your skin should move with the helmet — not the helmet sliding on your skin.
- Retention system: Fasten the chin strap. You should be able to fit no more than two fingers under the strap.
Custom Helmet Fit Tips
Because every KONG30 lid is custom-built, here's what to keep in mind:
- Share your exact measurement: When placing your order, include your head circumference in the order notes for the most precise fit.
- Head shape matters: Helmets come in round oval, intermediate oval, and long oval profiles. If you know your head shape, let us know so we can select the best shell.
- Liner break-in: Custom liners are firm when new and will conform to your head shape over 15–20 hours of wear. Don't size up just because it feels tight at first.
- Questions? We're happy to help before you order. Contact us here and we'll guide you to the right size.