How to Measure Your Head for a Bike Helmet (Step‑by‑Step Guide)

 

1. Gather Your Tools

• A flexible tape measure (or string + ruler)

• A mirror or a friend to help

2. Find the Right Spot to Measure

Wrap the tape snugly around your head about 1 cm (½″) above your eyebrows, crossing the widest part over the back of your skull.

3. Take the Measurement

• Keep the tape level and firm—but not tight.

• Read the largest of two or three measurements.

• Record in centimeters (or inches).

4. Match to the Size Chart

Compare your head measurement to Xnito’s helmet size chart:

• M (Medium): 21.2 – 22.8 inches (54 – 58 cm)

• L (Large): 22.8 – 23.6 inches (58 – 60 cm)

• XL (Extra Large): 23.6 – 25 inches (60 – 63.5 cm)

If you're between sizes, we recommend sizing up for comfort — especially if you prefer to wear a cap or winter liner underneath.

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Tips for Best Fit & Comfort

• Check helmet shape Even with the right measurement, a helmet that matches your head shape feels better.

• Wear normal gear when measuring—like a headband or ponytail—to ensure accurate fit.

• Use the “Two-Finger Rule” for straps:

  • Helmet front should sit ~1 finger-width above eyebrows.

  • Side straps form a V shape under each ear.

  • Chin strap tightened so only one finger fits between strap and chin.

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Why Fit Matters

• A properly fitting helmet protects you when it counts—excess wiggle means less protection.

• It enhances comfort—minimizes pressure spots and slippage.

• When adjusted well, it becomes practically invisible while riding.

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Quick Fit Checklist

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Final Tips

• If you're between sizes, we recommend sizing up for comfort.

• Still unsure about fit? Try helmets in-store before ordering online.

• Once you find a good fit, mark the size for future reference.

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A few minutes measuring the right way now saves discomfort, headaches, or worse later. A properly fitting helmet = peace of mind and better rides every time.