A Classic Mens Paisley Pattern Red Shirt Long Sleeve Button Down Shirt with Button Down Collar Quality tailored fit ensures stylish look Size underarm to underarm: Medium: 21.5inches / 53.75cm Large: 22.5inches / 56.35cm XLarge 23.5inches / 58.75cm Shoulder Seam to Bottom of Shirt: 70cm Collar Size Guide: Med collar 15 -15.5 Large collar 16 -16.5 XLarge collar 17 -17.5