Adult Snocross Snowmobile Helmet - Purple (Medium) Our adult snocross helmet is loaded with features! Please measure for size. Each manufacturers sizing is different. SIZE CHART (Circumference of the largest part of your head, usually just above the eyebrows) in inches SMALL: 22 to 22  - MEDIUM: 22  to 23 - LARGE: 23 to 23  - XL: 23  to 24 - XXL: 24 to 24  Head shapes can affect how a helmet fits. The size chart is meant to be a starting point. Helmet features a comfortable removable liner, adjustable breath box, lightweight shell and is certified to meet the DOT standard (FMVSS 218) This is the perfect choice for those looking for a high quality snocross helmet and goggle package at an affordable price Liner is easily removable &amp; machine washable Intake vents, channel vents and exhaust vents allow air flow 3 point sun visor Standard chin strap d-ring closure and strap keeper Soft and comfortable interior Weighs just under 3lbs Helmet bag included Take a head measurement with a cloth tape measure. Wrap the tape measure around your head one inch above your eyebrows, directly above your ears and to the widest area at the back of your head. This will give you the circumference, which is the measurement displayed below. Easy installation Bends to form to your face Reduces fog and ice on goggles