Size Chart: (Chest is measured flat pit to pit, Length is collar to waist)XS - 19 inch chest, 27 inch lengthSmall - 20 inch chest, 28 inch lengthMedium - 22 inch chest, 29 inch lengthLarge - 24 inch chest, 30 inch lengthXL - 26 inch chest, 31 inch lengthXXL - 27 inch chest, 32 inch lengthXXXL - 28 inch chest, 32 inch length