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| Gauge No. | B.W.G | U.S.G |
| inch | mm | inch | mm |
| 6 | .203 | 5.156 | .2031 | 5.16 |
| 7 | .180 | 4.572 | .1875 | 4.76 |
| 8 | .165 | 4.191 | .1719 | 4.37 |
| 9 | .148 | 3.759 | .1563 | 3.97 |
| 10 | .134 | 3.404 | .1406 | 3.57 |
| 11 | .120 | 3.048 | .1250 | 3.18 |
| 12 | .109 | 2.769 | .1094 | 2.78 |
| 13 | .095 | 2.413 | .0938 | 2.38 |
| 14 | .083 | 2.108 | .0781 | 1.98 |
| 15 | .072 | 1.829 | .0703 | 1.79 |
| 16 | .065 | 1.651 | .0625 | 1.59 |
| 17 | .058 | 1.473 | .0563 | 1.43 |
| 18 | .049 | 1.245 | .0500 | 1.27 |
| 19 | .042 | 1.067 | .0438 | 1.11 |
| 20 | .035 | .889 | .0375 | .953 |
| Gauge No. | B.W.G | U.S.G |
| inch | mm | inch | mm |
| 21 | .032 | .813 | .0344 | .873 |
| 22 | .028 | .711 | .0313 | .794 |
| 23 | .025 | .635 | .0218 | .714 |
| 24 | .022 | .559 | .0250 | .635 |
| 25 | .020 | .508 | .0219 | .556 |
| 26 | .018 | .457 | .0188 | .478 |
| 27 | .016 | .406 | .0172 | .437 |
| 28 | .014 | .356 | .0156 | .396 |
| 29 | .013 | .330 | .0141 | .358 |
| 30 | .012 | .305 | .0125 | .318 |
| 31 | .010 | .254 | .0109 | .277 |
| 32 | .009 | .229 | .0102 | .259 |
| 33 | .008 | .203 | .0094 | .239 |
| 34 | .007 | .178 | .0086 | .218 |
| 35 | .005 | .127 | .0078 | .198 |
