Model is 5'10" / 178cm and weighs 159lbs / 72.5kg. Wears a size M. Please use this info as a general guide as measurements are approximate. Size Shoulder Chest S 16.9" / 43 cm 37.8" / 96 cm M 17.7" / 45 cm 39.8" / 101 cm L 18.5" / 47 cm 41.7" / 106 cm XL 19.3" / 49 cm 43.7" / 111 cm XXL 20.1" / 51 cm 45.7" / 116 cm Size Sleeve Length S 7.7" / 19.5 cm 25.2" / 64 cm M 8" / 20.5 cm 26" / 66 cm L 8.5" / 21.5 cm 26.8" / 68 cm XL 8.9" / 22.5 cm 27.6" / 70 cm XXL 9.3" / 23.5 cm 28.3" / 72 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. **