Sterling Silver Wire. 21 Gauge, Round, Half Hard. 1 Ounce / 24 Feet Of Wire. Can't stop wire wrapping? Save money, buy in bulk. This gauge and hardness of Sterling Silver wire is perfect for hanging and wrapping medium to large size glass & crystal beads NOTE: Each lot is approximately one ounce in weight, and approximately 24 feet long. May vary from this amount by up to one percent.