Bell Custom 500 Airtrix Heritage Helmet Size Chart
Bell Custom 500/Moto-3/MX-9/Qualifier/Recon Helmet Sizing
Sizing information is provided by the manufacturer and does not guarantee a perfect fit.
How to Measure
Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, repeat for good measure and use the largest measurement.