**Model - 5' 10", 178cm / 159lbs, 72.5kg. Size M.** **Model - 5' 10"/ 136lbs, 178cm/ 62kg. Size S.** Please use this info as a general guide as measurements are approximate. Size Shoulder Chest S 16.9"/ 43 cm 39.4"/ 100 cm M 17.7"/ 45 cm 41.3"/ 105 cm L 18.5"/ 47 cm 43.3"/ 110 cm XL 19.7"/ 50 cm 45.3"/ 115 cm XXL 20.9"/ 53 cm 47.2"/ 120 cm XXXL 22"/ 56 cm 49.2"/ 125 cm Size Sleeve Length S 7.5"/ 19 cm 25.2"/ 64 cm M 7.9"/ 20 cm 26"/ 66 cm L 8.3"/ 21 cm 26.8"/ 68 cm XL 8.7"/ 22 cm 27.6"/ 70 cm XXL 9.1"/ 23 cm 28.3"/ 72 cm XXXL 9.4"/ 24 cm 29.1"/ 74 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. **