**Model - 5' 10", 158lbs / 178cm, 72.5kg. Size L.** Please use this info as a general guide as measurements are approximate. Size Shoulder Chest XS 16.9" / 43 cm 38.2" / 97 cm S 17.3" / 44 cm 39.8" / 101 cm M 18.1" / 46 cm 41.7" / 106 cm L 18.1" / 46 cm 42.9" / 109 cm XL 18.9" / 48 cm 45.3" / 115 cm XXL 18.9" / 48 cm 46.5" / 118 cm Size Sleeve ½Biceps XS 22.8" / 58 cm 7.1" / 18 cm S 23.2" / 59 cm 7.5" / 19 cm M 23.6" / 60 cm 7.9" / 20 cm L 24.0" / 61 cm 8.3" / 21 cm XL 24.4" / 62 cm 8.7" / 22 cm XXL 24.8" / 63 cm 9.1" / 23 cm Size Length XS 28.3" / 72 cm S 28.7" / 73 cm M 29.1" / 74 cm L 29.5" / 75 cm XL 29.9" / 76 cm XXL 30.3" / 77 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. **