**Model - 5' 11", 187lbs / 180cm, 85kg. Size42.** Please use this info as a general guide as measurements are approximate. Size Shoulder Chest 36 17.1" / 43.5 cm 40.6" / 103 cm 38 18.1" / 46 cm 42.5" / 108 cm 40 19.1" / 48.5 cm 44.5" / 113 cm 42 20.1" / 51 cm 46.5" / 118 cm 44 21.1" / 53.5 cm 48.4" / 123 cm Size Length Sleeve 36 25.4" / 64.5 cm 9.6" / 24.5 cm 38 26.2" / 66.5 cm 10" / 25.5 cm 40 27" / 68.5 cm 10.4" / 26.5 cm 42 27.8" / 70.5 cm 10.8" / 27.5 cm 44 28.5" / 72.5 cm 11.2" / 28.5 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. **