DOT Blue Boneyard German Motorcycle Helmet with Skulls (Size L, LG, Large) DOT Blue Boneyard German Motorcycle Helmet with Skulls. Meets and exceeds DOT safety standards. FMVSS 218 Helmet Meets and Exceeds D.O.T. Safety Standards. Super light weight, Approximately 30 oz. Smallest construction Free Helmet Bag and Owners Manual included. Quality Plush Interior. Stainless Steel Dual D-rings adjustable chin strap. Durable exterior finish. Clear Coat Finish. 1 year warranty. How to measure for a motorcycle helmet. Use a fabric tape measure and measure the distance around your head just above your eyebrows. Then select a size from these options, all sizes in inches . - XS 20 1/4 - 20 7/8 / SM 21 - 21 5/8 / MD 21 3/4 - 22 3/8 / LG 22 1/2 - 23 1/8 / XL 23 1/4 - 24 / 2XL 24 1/8 - 24 7/8 /