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.