Model is 5'10"/ 178cm and weighs 136lbs/ 62kg. Wears a size M. Please use this info as a general guide as measurements are approximate. Size Shoulder Chest S 17.7" / 45 cm 39.4" / 100 cm M 18.1" / 46 cm 41.3" / 105 cm L 18.9" / 48 cm 43.3" / 110 cm XL 19.7" / 50 cm 45.7" / 116 cm XXL 20.5" / 52 cm 48" / 122 cm Size Sleeve Length S 7.9" / 20 cm 25.8" / 65.5 cm M 8.3" / 21 cm 26.4" / 67 cm L 8.8" / 22 cm 27" / 68.5 cm XL 9.1" / 23 cm 27.6" / 70 cm XXL 9.4" / 24 cm 28.1" / 71.5 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. **