Model is 5'10"/ 178cm and weighs 136lbs/ 62kg. Wears a size S. Please use this info as a general guide as measurements are approximate. Size Shoulder Chest S 17.7" / 45 cm 40.2" / 102 cm M 18.5" / 47 cm 41.7" / 106 cm L 19.3" / 49 cm 44.1" / 112 cm XL 20.1" / 51 cm 44.9" / 114 cm XXL 20.9" / 53 cm 46.5" / 118 cm Size Sleeve Length S 23.6" / 60 cm 26.4" / 67 cm M 24.4" / 62 cm 27.2" / 69 cm L 24.8" / 63 cm 27.6" / 70 cm XL 25.2" / 64 cm 28" / 71 cm XXL 25.6" / 65 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. **