1storm Motorcycle Street Bike Modular/Flip Up Dual Visor/Sun Shield Full Face Helmet Hg339 Carbon Fiber Black, Size: Small

Helmet Size Chart XS 51-52 CM 20.1/20.5 Inch S 53-54 CM 20.9/21.3 Inch M 55-56 CM 21.7/22.0 Inch L 57-58 CM 22.4/22.8 Inch XL 59-60 CM 23.2/23.4 Inch XXL 61-62 CM 23.8/24.1 Inch Helmet Size Tips (1)Wra measuring tape around your head about a half-inch above eyebrows (2)Take measurement two to three times to pick the largest one. Features: DOT Approved; Size S (53-54 CM,20.9/21.3 Inch); Advanced Modular/Flip up and Dual Lens Design (inner smoked lens/outer clear shield); Light Weight Durable Aerodynamic Thermoplastic Alloy Shell Beautiful Glossy UV Protective Finish Removable and Washable Padding,Vehicles & Parts > Vehicle Parts & Accessories,Power Gear Motorsports