 Bracelet and necklace wire components are generally made out of wire that is 16-, 18- or 20-gauge (1.3 to 0.8 mm).Earring wires are usually made out of 18- or 20-gauge wire (1.0 to 0.8 mm).When making wire wrapped jewelry, these components are connected to one another with wire that is generally 20- to 26-gauge (0.8 to 0.4 mm).