Our own brand belts are 4cm wide with high quality stitching. They're extremely durable and easy to tie, making them ideal for training and grading. They suit a wide variety of Disciplines. 100% colour fast. Available in Sizes 230cm, 250cm, 280cm and 320cm.. In order to get the correct size for a double wrap belt, take a measuring tape and wrap it around your waist where you want to wear the belt. Multiply this measurement by three, and select the belt length that is closest to this number.