Shoei GT-Air Cheek Pad Set 35mm Street Motorcycle Helmet Accessories - Black/One Size Cheek Pad Set for the GT-Air, 35mm. The number on the cheek pad is the thickness in millimeters. Thinner pads can be applied to loosen the fit, thicker pads can be applied to tighten the fit. All sizes of cheek pads will fit any size GT-Air. Stock sizes are as follows: XS = 39mm; S, M, L, XL = 35mm; and XXL = 31mm.