The Tatami BJJ belt is 4cm wide and 0.5cm thick. The length is dependent upon the size ordered, and the size ordered must be the same size as your GI.
The Bad Boy BJJ belt is 100% cotton with the logo on the end. They are tailored to traditional specifications, comprising of a coloured layer of cotton wrapped around a variable number of filler layers and stitched together. One end of the BJJ belts will always have a black tab where your instructor will award up to 4 stripes indicating your progress within the belt. The size again corresponds to the size of your GI.