**Model - 5'10", 159lbs / 178cm, 72.5kg. Size M.** Please use this info as a general guide as measurements are approximate. Size Shoulder Chest S 16.9" / 43 cm 39.4" / 100 cm M 17.7" / 45 cm 41.3" / 105 cm L 18.5" / 47 cm 43.3" / 110 cm XL 19.7" / 50 cm 45.3" / 115 cm 2XL 20.9" / 53 cm 47.2" / 120 cm 3XL 22" / 56 cm 49.2" / 125 cm Size Sleeve Length S 7.5" / 19 cm 25.2" / 64 cm M 7.9" / 20 cm 26" / 66 cm L 8.3" / 21 cm 26.8" / 68 cm XL 8.7" / 22 cm 27.6" / 70 cm 2XL 9.1" / 23 cm 28.3" / 72 cm 3XL 9.4" / 24 cm 29.1" / 74 cm In order to best determine fit, it may be helpful to compare our garment’s measurements to a similar garment you already own. Lay your garment on a flat surface and take all measurements from the outside of the garment. Click here to check out our Garment Measuring Guide. ** If you are still confused, you can Contact Us to help you choose the size. **