Specifications:- Overall Dimension(LxWxH): 11 13/16" x 10 7/16" x 6 11/16" (30 x 26.5 x 17 cm)- Size: L- Fits Head Circumference: 22 13/16" to 23 1/4" (58 to 59 cm)- Material: Abs, Eps- Net Weight: 2 Lbs (0.9 kg). Package Contents:- 1x Helmet- 1x Epe Bag- 1x Carrying Bag- 1x Manual. Notice: - Before purchasing, please measure your head's circumference to determine which size is suitable for you.- Make sure the measuring tape lays flat against your head but doesn't pinch. It should be level all the way around.