This item is marked "slim-fit" I recommend one size larger unless you like the classic "Slim-Fit" sizing or have a slim build. All measurements are taken on the outside of the jacket. Size S / (Small) Chest (armpit to armpit): 22" / 56cm Length (waist to neck-line): 25.9" / 66cm Arm outside: (cuff to shoulder seam) 26.8" / 68cm Arm inside: (cuff to armpit) 20.4" / 52cm Shoulder width: (shoulder seam to shoulder seam) 18.5" / 47cm Size M / (Medium) Chest (armpit to armpit): 22.8" / 58cm Length (waist to neck-line): 26.3" / 67cm Arm outside: (cuff to shoulder seam) 27.1" / 69cm Arm inside: (cuff to armpit) 20.9" / 53cm Shoulder width: (shoulder seam to shoulder seam) 19.1" / 48.5cm Size L / (Large) Chest (armpit to armpit): 23.6" / 60cm Length (waist to neck-line): 26.7" / 68cm Arm outside: (cuff to shoulder seam) 27.5" / 70cm Arm inside: (cuff to armpit) 21.2" / 54cm Shoulder width: (shoulder seam to shoulder seam) 19.7" / 50cm Size XL / (Extra-Large) Chest (armpit to armpit): 24.8" / 63cm Length (waist to neck-line): 27.1" / 69cm Arm outside: (cuff to shoulder seam) 27.9" / 71cm Arm inside: (cuff to armpit) 21.6" / 55cm Shoulder width: (shoulder seam to shoulder seam) 20.2" / 51.5cm Size XXL(2XL) / (2X-Large) Chest (armpit to armpit): 26" / 66cm Length (waist to neck-Line): 27.5" / 70cm Arm outside: (cuff to shoulder seam) 28.3" / 72cm Arm inside: (cuff to armpit) 22" / 56cm Shoulder width: (shoulder seam to shoulder seam) 21" / 53cm Size XXXL(3XL) / (3X-Large) Chest (armpit to armpit): 27.1" / 69cm Length (waist to neck-Line): 28.3" / 72cm Arm outside: (cuff to shoulder seam) 28.7" / 73cm Arm inside: (cuff to armpit) 22.2" / 56.5cm Shoulder width: (shoulder seam to shoulder seam) 21.8" / 55.5cm