Model is 5' 10"/ 178cm, 159lbs/ 72.5kg, wears a size 38. Please use this info as a general guide as measurements are approximate. Size Shoulder Chest 36 19.3" / 49 cm 40.9" / 104 cm 38 20.3" / 51.5 cm 42.9" / 109 cm 40 20.5" / 52 cm 44.9" / 114 cm 42 21.5" / 54.5 cm 46.5" / 118 cm 44 21.7" / 55 cm 48" / 122 cm Size Sleeve Length 36 22.8" / 58 cm 26.8" / 68 cm 38 23.6" / 60 cm 27.6" / 70 cm 40 24" / 61 cm 28.3" / 72 cm 42 24.8" / 63 cm 29.1" / 74 cm 44 25.2" / 64 cm 30" / 76 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. **