Gauge No ASWG (America standard Wire gauge ) BWG (Birmingham wire Gauge ISWG (Imperial standard wire gauge) 8# 4.114mm 4.191mm 4.064mm 9# 3.766mm 3.759mm 3.658mm 10# 3.429mm 3.403mm 3.251mm 11# 3.06mm 3.048mm 2.946mm 12# 2.679mm 2.768mm 2.642mm 13# 2.324mm 2.413mm 2.337mm 14# 2.032mm 2.108mm 2.032mm 15# 1.829mm 1.829mm 1.829mm