Ex Alien Dot New EX Style DOT Helmets The lightest and smallest real DOT motorcycle helmet with revolutionary components. We're taking orders now. DOT Motorcycle Helmets have become a necessity for every motorcycle rider. Our lightweight comfortable DOT designs make it perfect for all types of riding including scooters, ATVs, motorcycles, and everything in between. Specify size when ordering. Size Inches XS 20 1/4 - 20 7/8 S 21 - 21 5/8 M 21 3/4 - 22 3/8 L 22 1/2 - 23 1/8 XL 23 1/4 - 24 XXL 24 1/8 - 24 7/8