Model is 5' 10"/ 178cm, weighs 136lbs/ 62kg, wears a size M. Please use this info as a general guide as measurements are approximate. Size Shoulder Chest S 18.1" / 46 cm 42.5" / 108 cm M 18.9" / 48 cm 44.5" / 113 cm L 19.7" / 50 cm 46.4" / 118 cm XL 20.4" / 52 cm 48.4" / 123 cm XXL 21" / 53.5 cm 50.4" / 128 cm Size Sleeve Length S 23.2" / 59 cm 24.8" / 63 cm M 23.6" / 60 cm 25.6" / 65 cm L 24.4" / 62 cm 26.3" / 67 cm XL 24.8" / 63 cm 27.1" / 69 cm XXL 25.4" / 64.5 cm 28" / 71 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. **