Specifications:- Overall Dimension(LxWxH): 12 11/16"" x 10 13/16"" x 6 15/16"" (32.3 x 27.5 x 17.7 cm)- Size: Xl- Fits Head Circumference: 23 5/8"" to 24"" (60 to 61 cm)- Material: Abs, Eps- Net Weight: 2.2 Lbs (0.98 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.