Men’s Coats & Jackets Size Guide Please find the size label in the chart below and its equivalent measurements. How to Measure Chest: Measure around the fullest part across shoulder blades, keeping the tape parallel to the floor.Waist: Measure around the natural waist line across the belly button, keeping the tape parallel to the floor.Hip: Stand with feet together and measure around the widest point of the hip, keep the tape parallel to the floor.