Model Height Weight Size 1 5'9" / 175cm 143lbs / 65kg S 2/Shown 5'10" / 178cm 159lbs / 72.5kg M 3 5'11" / 180cm 176lbs / 80kg L 4 6' / 183cm 187lbs / 85kg XL 5 5'11" / 182cm 202lbs / 92kg XXL Please use this info as a general guide as measurements are approximate. Size Shoulder Chest S 18.5" / 47cm 42.1" / 107cm M 18.9" / 48cm 44.1" / 112cm L 19.5" / 49.5cm 46.1" / 117cm XL 20.1" / 51cm 47.6" / 121cm XXL 20.9" / 53cm 50" / 127cm Size Length Sleeve S 24" / 61cm 21.7" / 55cm M 24.4" / 62cm 22.4" / 57cm L 25.2" / 64cm 22.8" / 58cm XL 26" / 66cm 23.6" / 60cm XXL 27.2" / 69cm 24.2" / 61.5cm 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. **