Model - 5' 10", 183lbs / 178cm, 83kg. Size L. Please use this info as a general guide as measurements are approximate. Size Waist Seat XS 29.9" / 76 cm 43.3" / 110 cm S 31.5" / 80 cm 45.3" / 115 cm M 33.1" / 84 cm 47.2" / 120 cm L 34.6" / 88 cm 49.2" / 125 cm XL 36.2" / 92 cm 51.2" / 130 cm XXL 38.6" / 98 cm 53.1" / 135 cm Size Front Rise Back Rise XS 13.4" / 34 cm 18.1" / 46 cm S 13.8" / 35 cm 18.5" / 47 cm M 14.2" / 36 cm 18.9" / 48 cm L 14.6" / 37 cm 19.3" / 49 cm XL 15" / 38 cm 19.7" / 50 cm XXL 15.4" / 39 cm 20.1" / 51 cm Size Thigh Inseam XS 27.6" / 70 cm 29.5" / 75 cm S 28.3" / 72 cm 29.9" / 76 cm M 29.5" / 75 cm 30.3" / 77 cm L 30.7" / 78 cm 30.7" / 78 cm XL 31.5" / 80 cm 31.1" / 79 cm XXL 32.3" / 82 cm 31.5" / 80 cm Size Length Leg Opening XS 41.7" / 106 cm 17.7" / 45 cm S 42.5" / 108 cm 18.1" / 46 cm M 43.3" / 110 cm 18.5" / 47 cm L 44.1" / 112 cm 18.9" / 48 cm XL 44.9" / 114 cm 19.3" / 49 cm XXL 45.7" / 116 cm 19.7" / 50 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. **