Galvanized Iron Wire Technical Information Processing with low carbon steel wire, through drawing and electric galvanizing Standard wire gauge from 8# to 16# Galvanized iron wire uses in weaving of wire mesh, fencing for expressway and construction. Galvanized wire, steel wire, annealed wire wire gauge size SWG(mm) BWG(mm) metric(mm) 8 4.06 4.19 4.00 9 3.66 3.76 - 10 3.25 3.40 3.50 11 2.95 3.05 3.00 12 2.64 2.77 2.80 13 2.34 2.41 2.50 14 2.03 2.11 - 15 1.83 1.83 1.80 16 1.63 1.65 1.65 17 1.42 1.47 1.40 18 1.22 1.25 1.20 19 1.02 1.07 1.00 20 0.91 0.89 0.90 21 0.81 0.813 0.80 22 0.71 0.711 0.70