Model is 5' 10"/ 178cm and weighs 154lbs/ 70kg. Wears a size M. Please use this info as a general guide as measurements are approximate. Size Shoulder Chest S 18.1" / 45 cm 38.6" / 98 cm M 18.5" / 46 cm 40.2" / 102 cm L 18.9" / 47 cm 41.7" / 106 cm XL 19.3" / 48 cm 43.3" / 110 cm XXL 19.7" / 49 cm 45.3" / 115 cm XXXL 20.5" / 50 cm 47.2" / 120 cm Size Sleeve Length S 8.3" / 20 cm 24.8" / 63 cm M 8.5" / 21 cm 25.6" / 65 cm L 8.9" / 22 cm 26.4" / 67 cm XL 9.2" / 23 cm 27.2" / 69 cm XXL 9.5" / 24 cm 28" / 71 cm XXXL 10" / 25 cm 28.7" / 73 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. **