Comfortable Shoulder Fit. Size S Chest: 35.5-37.5 Waist: 30.5-32.5. Size M Chest: 37.5-39.5 Waist: 32.5-34.5. Size L Chest: 40-42 Waist: 35-37. Size XL Chest: 43-45.5 Waist: 38-40. Size XXL Chest: 46.5-48.5 Waist: 41-43.