Please carefully read the size info before purchase! Different products have different size info. Please use this info as a general guide as measurements are approximate. Model - 5'10", 167lbs / 178cm, 76kg. Size M. Size Shoulder Chest S 17.1" / 43.5 cm 41.3" / 105 cm M 17.7" / 45 cm 43.3" / 110 cm L 18.3" / 46.5 cm 45.3" / 115 cm XL 18.9" / 48 cm 47.2" / 120 cm XXL 19.5" / 49.5 cm 49.2" / 125 cm Size Length Sleeve S 28.3" / 72 cm 24.2" / 61.5 cm M 29.1" / 74 cm 24.8" / 63 cm L 29.9" / 76 cm 25.4" / 64.5 cm XL 30.7" / 78 cm 26" / 66 cm XXL 31.5" / 80 cm 26.6" / 67.5 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. **