Size Guide
📏 How to Measure Your Head
All NEONX masks and helmets use an adjustable elastic strap system that fits most adult head sizes. To ensure the best fit, measure your head circumference before ordering.
Measuring Instructions
- Use a flexible measuring tape (or a piece of string + ruler)
- Wrap it around your head — above your eyebrows and ears, across the widest part of the back of your head
- Keep the tape snug but not tight
- Note the measurement in centimeters or inches
📊 Size Chart
| Size | Head Circumference | Best For |
|---|---|---|
| Standard | 54–60 cm (21.3–23.6 in) | 95% of adults — our default size for all masks |
| Large (select helmets) | 58–64 cm (22.8–25.2 in) | Larger heads, helmets with extra padding |
✅ Fit & Comfort FAQ
Will it fit over my glasses?
Yes. Our masks are designed with extra interior clearance to accommodate most prescription glasses and sunglasses. Oversized frames may feel snug — we recommend frames under 140mm width.
Is the mask one-size-fits-all?
All masks feature adjustable elastic straps with velcro or buckle closures. You can tighten or loosen the fit in seconds. The strap range covers 54–60 cm head circumferences comfortably.
What about helmets?
Helmets (Iron Man, Mecha, GR-74, etc.) include internal foam padding and an adjustable headband. If your head circumference is above 60 cm, we recommend the Large option where available.
Can I return it if it doesn't fit?
Yes — all standard masks are covered by our 30-day return policy. DIY custom masks are final sale and cannot be returned for sizing reasons. Please measure carefully before ordering custom pieces.
📸 Visual Fit Reference
Our masks sit comfortably on the face with full peripheral vision through the eye openings. The weight ranges from 280g–450g depending on the model — about the same as a pair of over-ear headphones.
Still unsure about sizing? Contact us with your head measurement and the mask you're interested in — we'll confirm the fit before you order.