Gauge is often used to measure American
body jewelry. Know your sizes!
gauge inches millimeters
20 0.032 0.812
18 0.040 1.024
16 0.051 1.291
14 0.064 1.628
12 0.081 2.053
10 0.102 2.588
8 0.128 3.264
6 0.162 4.115
4 0.204 5.189
2 0.258 6.544
0 0.325 8.251
00 0.365 9.266