Comes in 1/4 lb. rolls.
Tinned copper wires are already coated with solder ready to accept patinas, or leave silver.

THE HIGHER THE NUMBER-THE THINNER THE WIRE

14 gauge, .064" (1.6mm), 4oz. (113g), 20' (6m)
16 gauge, .051" (1.3mm), 4oz. (113g), 32' (9.8m).
18 gauge, .040" (1.0mm), 4oz. (113g), 50' (15.2m).
20 gauge, .032" (.8mm), 4oz. (113g), 79' (24m).
24 gauge, .020" (.5mm), 4oz. (113g), 198' (60m).