Size reference for Galvanized Iron Wire and PVC Coated Iron Wire: Wire Gauge SWG in mm BWG in mm In Metric System 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 23# to 34# also available for galvanized iron wire.
