Gauge sizes for piercings range, with a better selection meaning a thinner bar. The size of your piercing is measured by basically how thick the bar is when selecting jewelry to insert into your piercing. In body piercing stretching, gauge sizes work similarly to your American Wire Gauge (AWG) system https://adultsonlysinglescruises88530.thebindingwiki.com/7824698/what_does_metal_feather_earring_mean