XX-Large Top Flow Flat Black Pro 20 Helmet, Snell SA 2020, Head And Neck Support Ready, Flat Black, 2X-Large, Each product Line pro20 Helmet Size 2X-Large circumference Low Range (In)24-13/16 In circumference High Range (In)25-3/16  Size Low Range 7-7/8 Hat Size High Range 8 Open/Closed Face closed fresh Air yes top Air yes vent System yes Snell Rating SA 2020