A Classic Mens 1960s Style Paisley Burgundy 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: Small collar 14 -14.5 Med collar 15 -15.5 Large collar 16 -16.5 XLarge collar 17 -17.5 XXLarge collar 18 -18.5