S-Raw DOT Motorcycle Half Helmet Lightweight Harley Motorcycle Helmet Cruiser Scooter Snowmobile Helmet Meets DOT Safety Standards. Vintage Cute and Cool Style Half Helmet with Sleek Design. Lightweight & Durable ABS Composite Material Shell. Provides a Higher Degree of Protection and Impact Absorption. Helmet Liner is Lightweight, Soft and Easily Washable, Well Vented All Purpose Product for Four Seasons Especially Summer Riding. Please measure your head size before making a purchase. The circumference of the head should be measured at a point approximately one inch above the eyebrows, or at whatever point gives the largest possible measurement. Label Size MEDIUM: Suit For The Head Circumference 22-22.8 inches(56-58cm); LARGE: Suit For The Head Circumference 23.2-23.5 inches(59-60cm); XL: Suit For The Head Circumference 24-24.4 inches(61-62cm).