Size Conversion Chart

SWG inches mm
0 .324 8.230
1 .300 7.620
2 .276 7.010
3 .252 6.401
4 .232 5.893
5 .212 5.385
6 .192 4.877
7 .176 4.470
8 .160 4.064
9 .144 3.658
10 .128 3.251
11 .116 2.946
12 .104 2.642
13 .092 2.337
14 .080 2.032
15 .072 1.829
16 .064 1.626
17 .056 1.422
18 .048 1.219
19 .040 1.016
20 .036 0.914
21 .032 0.813
22 .028 0.711
23 .024 0.610
24 .022 0.559
25 .020 0.508

BWG inches mm
0 .340 8.636
1 .300 7.620
2 .284 7.213
3 .259 6.578
4 .238 6.045
5 .220 5.588
6 .203 5.516
7 .180 4.572
8 .165 4.190
9 .148 3.759
10 .134 3.403
11 .120 3.048
12 .109 2.768
13 .095 2.413
14 .083 2.108
15 .072 1.829
16 .065 1.651
17 .058 1.473
18 .049 1.244
19 .042 1.067
20 .035 0.889
21 .032 0.812
22 .028 0.711
23 .025 0.635
24 .022 0.559
25 .020 0.508