"Full-Hard" wire holds its shape for wire-wrapping jewelry. Its tempered nature holds intricate designs well. In reference to wire gauge size numbers, the larger the number, the smaller the diameter of the wire. Example: 24 gauge wire is smaller in diameter than 18 gauge wire.
Wire-Wrapping Wire>Gold-Filled>Gold ColoredWire-Wrapping WireGold-FilledGold Colored21 GaFull HardHalf-Roundhttp://www.firemountaingems.com/itemdetails/h201394wrH201394WRWire, 12Kt gold-filled, full-hard, half-round, 21 gauge. Sold per pkg of 5 feet.//image1.fmgstatic.com/images/p1394wrb.jpg7.157.15As Low As $1.23 per foot