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 35.4" / 90 cm M 17.7" / 45 cm 37.4" / 95 cm L 18.5" / 47 cm 39.4" / 100 cm XL 19.3" / 49 cm 41.7" / 106 cm XXL 20.1" / 51 cm 44.1" / 112 cm Size Sleeve Length S 8.3" / 21 cm 25.2" / 64 cm M 8.7" / 22 cm 26" / 66 cm L 9.1" / 23 cm 26.8" / 68 cm XL 9.4" / 24 cm 27.6" / 70 cm XXL 9.6" / 24.5 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. **