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Wire Gauge Table - Metric Sizes The first column gives the Gauge Number and the other columns give the exact size in mm for the particular standard. Gauge No   SWG     AWG     Stubbs   Birmingham Sheet Metal Washburn & Meon US Sheet S & W Music Wire Birmingham Stubbs Iron 7/0 12.7000     16.9316 12.4460       6/0 11.7856     15.8750 11.7221 11.9050 0.1016   5/0 10.9728     14.9428 10.9347 11.1125 0.1270   4/0 10.1600 11.6840   13.7566 10.0025 10.3175 0.1524 11.7856 3/0 9.4488 10.4038   12.7000 9.2075 9.5250 0.1778 10.7950 2/0 8.8392 9.2659   11.3081 8.4074 8.7300 0.2032 9.6520 0 8.2296 8.2525   10.0686 7.7851 7.9375 0.2286 8.6360 1 7.6200 7.3482 5.7658 8.9713 7.1882 7.1501 0.2540 7.6200 2 7.0104 6.5430 5.5626 7.9934 6.6675 6.7462 0.2794 7.2136 3 6.4008 5.8268 5.3848 7.1222 6.1900 6.3500 0.3048 6.5786 4 5.8928 5.1892 5.2578 6.3500 5.7226 5.9538 0.3302 6.0452 5 5.3848 4.6203 5.1816 5.6515 5.2578 5.5550 0.3556 5.5880 6 4.8768 4.1148 5.1054 5.0317 4.8768 5.1587 0.4064 5.1562 7 4.4704 3.6652 5.0546 4.4806 4.4958 4.7625 0.4572 4.5720 8 4.0640 3.2639 5.0038 3.9878 4.1148 4.3663 0.5080 4.1910 9 3.6576 2.9566 4.9276 3.5509 3.7668 3.9675 0.5588 3.7592 10 3.2512 2.5883 4.8514 3.1750 3.4290 3.5712 0.6096 3.4036 11 2.9464 2.3038 4.7752 2.8270 3.0607 3.1750 0.6604 3.0480 12 2.6416 2.0523 4.6990 2.5171 2.6797 2.7788 0.7366 2.7686 13 2.3368 1.8288 4.6228 2.2403 2.3241 2.3800 0.7874 2.4130 14 2.0320 1.6281 4.5720 1.9939 2.0320 1.9837 0.8382 2.1082 15 1.8288 1.4503 4.5212 1.7755 1.8288 1.7856 0.8890 1.8288 16 1.6256 1.2903 4.4450 1.5875 1.5875 1.5875 0.9398 1.6510 17 1.4224 1.1506 4.3688 1.4122 1.3716 1.4275 0.9906 1.4732 18 1.2192 1.0236 4.2672 1.2573 1.2065 1.2700 1.0414 1.2446 19 1.0160 0.9119 4.1656 1.1176 1.0414 1.1100 1.0922 1.0668 20 0.9144 0.8128 4.0894 0.9957 0.8839 0.9525 1.1430 0.8890 21 0.8128 0.7239 3.9878 0.8865 0.8052 0.8738 1.1938 0.8128 22 0.7112 0.6426 3.9370 0.7925 0.7264 0.7925 1.2446 0.7112 23 0.6096 0.5740 3.8862 0.7061 0.6553 0.7137 1.2954 0.6350 24 0.5588 0.5105 3.8354 0.6299 0.5842 0.6350 1.3970 0.5588 25 0.5080 0.4547 3.7592 0.5588 0.5182 0.5563 1.4986 0.5080 26 0.4572 0.4039 3.7084 0.4978 0.4597 0.4750 1.6002 0.4572 27 0.4166 0.3607 3.6322 0.4420 0.4394 0.4369 1.7018 0.4064 28 0.3759 0.3200 3.5306 0.3962 0.4115 0.3962 1.8034 0.3556 29 0.3454 0.2870 3.4036 0.3531 0.3810 0.3581 1.9050 0.3302 30 0.3150 0.2540 3.2258 0.3124 0.3556 0.3175 2.0320 0.3048 31 0.2946 0.2261 3.0480 0.2794 0.3353 0.2769 2.1590 0.2540 32 0.2743 0.2007 2.9210 0.2489 0.3251 0.2591 2.2860 0.2286 33 0.2540 0.1803 2.8448 0.2210 0.2997 0.2388 2.4130 0.2032 34 0.2337 0.1600 2.7940 0.1956 0.2642 0.2184 2.5400 0.1778 35 0.2134 0.1422 2.7686 0.1753 0.2413 0.1981 2.6924 0.1524 36 0.1930 0.1270 2.6924 0.1549 0.2286 0.1778 2.8448 0.1016 37 0.1727 0.1143 2.6162 0.1372 0.2159 0.1676 2.9972   38 0.1524 0.1016 2.5654 0.1219 0.2032 0.1575 3.1496   39 0.1321 0.0889 2.5146 0.1092 0.1905   3.3020   40 0.1219 0.0787 2.4638 0.0991 0.1778   0.9652   41 0.1118   2.4130 0.0864     3.7084   42 0.1016   2.3368 0.0787     3.9116   43 0.0914   2.2352 0.0686     4.1148   44 0.0813   2.1590 0.0610     4.3180   45 0.0711   2.0574 0.0533     4.5720   46 0.0610   2.0066 0.0483         47 0.0508   1.9558 0.0432         48 0.0406   1.9050 0.0381         49 0.0305   1.8288 0.0330         50 0.0254   1.7526 0.0305