Model is 5'10"/ 178cm and weighs 183lbs/ 83kg. Wears a size L. Please use this info as a general guide as measurements are approximate. Size Shoulder Chest S 20.1" / 51 cm 42.5" / 108 cm M 20.8" / 53 cm 44.9" / 114 cm L 21.6" / 55 cm 47.2" / 120 cm XL 22.4" / 57 cm 49.6" / 126 cm XXL 23.2" / 59 cm 51.9" / 132 cm Size Sleeve Length S 9.3" / 23.5 cm 26.8" / 68 cm M 9.6" / 24.5 cm 27.6" / 70 cm L 10" / 25.5 cm 28.3" / 72 cm XL 10.4" / 26.5 cm 29.1" / 74 cm XXL 10.8" / 27.5 cm 29.9" / 76 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. **