KR-1 replacement cheek pads: Size XS-XXS (YAKR0L07): 27mm cheek pads – make your XS a firmer fit. Size XS (YAKR0L01): 25mm cheek pads Size XS – S (YAKR0L08): 22mm cheek pads – loosen the fit in your XS, or firm up the fit in your SM. Size S (YAKR0L02): 20mm cheek pads Size S -M (YAKR0L09): 18mm cheek pads – loosen the fit in your SM, or firm up the fit in your MD. Size M (YAKR0L03): 15mm cheek pads Size M-L for MD shell (YAKR0L10): 12mm cheek pads – loosen the fit in your MD, the shell size changes after MD, so will not fit in a LG. Size M-L for LG shell (YAKR0L11): 18mm cheek pads – firm up the fit in your LG, the shell size changes for LG, so will not fit in a MD. Size L (YAKR0L04): 15mm cheek pads Size L-XL (YAKR0L12): 12mm cheek pads – loosen the fit in your LG, or firm up the fit in your XL. Size XL (YAKR0L05): 10mm cheek pads Size XL-XXL (YAKR0L13): 8mm cheek pads – loosen the fit in your XL, or firm up the fit in your XXL. Size XXL (YAKR0L06): 5mm XXL cheek pads Size XXL-XXXL (YAKR0L14): 2mm cheek pads – loosen the fit in your XXL.