Steel Memory Wire is a carbon steel wire that has been plated with a silver color. It is made into coils and sized for rings, bracelets and necklaces. The diameters are given in ranges to account for the variations in the manufacturing process. This wire is ideal when you want the shimmer and shine of a plated wire. Details: Silver colored Set of 4 wires Carbon steel Size Information: Ring - 0.7" to 0.87" (1.8cm to 2.2cm) X-Small Bracelet - 1.2" to 1.55" (3cm to 4cm) Bracelet - 1.75" to 2.2" (4.4cm to 5.6cm) Small Necklace - 3.35" to 3.6" (8.5cm to 9.1cm)