How to measure for a helmet

1. Measure the head at the level stated by the helmet manufacturer, usually above the eyebrows and ears.
2. Compare the result only with the exact model chart. Letter sizes are not universal.
3. Try the helmet on. It should be level, comfortable and snug.
4. Adjust retention straps so the helmet does not move in any direction.
5. Follow the product instructions and use a helmet compliant with the applicable safety requirements.

Reference basis

• U.S. CPSC bicycle helmet guidance

This page describes a measurement procedure. It does not certify the fit of a specific product.