Tiger Tail, Black Size: 0.38 in diameter, 50m/roll. Does it really matters that which wire is uesd in stringing beads? Yes, different wires will be used in different occassions. Such as thin wires can be used for stringing freshwater pearls. But when you string larger beads even rough stone, you will need a larger wire to bear in case of the wire is cut through. Tiger tail is a nice choice in this case.