Men's sizing, intended to fit true to size. RIB POLO COLLAR RIB CUFF AND HEM TRIM THREE-BUTTON HALF PLACKET CLOSURE Signature GIR branding at center back 100% Cashmere Medium-weight Ash is 5' 10" / 178 cm and is wearing a Medium. Soulemane is 6'3" / 190 cm and is wearing a Medium. Premium cashmere sourced from inner Mongolia, manufactured in China