Artistic Wire craft wire is considered "dead soft" on the wire hardness scale, because it is bendy and pliable. This is a round (or twisted!) copper wire that has been colored with an enamel coating. This process has been developed to resist tarnishing, chipping, or peeling. It'll stand up to all the wire wrapping, coiling, and twisting you're about to put it through!
Measurements: 3mm width