Width is 0.8" or 20 mm . Leather is 100% genuine hand-distressed vintage leather Dimension of each buckle/concho is 2.5" x 2.5" S/M: Start of leather to 1st hole 30", to last hole 34" to the tip end(total length) is 38" M/L: Start of leather to 1st hole 34", to last hole 38" to the tip end(total length) is 42" L/X: Start of leather to 1st hole 38", to last hole 42" to the tip end(total length) is 36"