ZeroNine Auto Racing Helmet Sizing Chart

To ensure an accurate for your new ZeroNine Auto Racing Helmet, use this chart to order your correct helmet size.

Carefully measure around your head, above the ears. Take the measurement, in inches or centimeters, referring to the sizing chart above for your correct hat/helmet size.

Your new ZeroNine Auto Racing Helmet must fit properly for optimum performance. Don't guess your size. Any ZeroNine Auto Racing Helmet must be securely and snugly fastened before engaging in any activity.