| Gauge |
Inches |
Millimeters |
| 20 |
.032" |
0.8 |
| 18 |
.040" |
1.0 |
| 16 |
.050" |
1.2 |
| 14 |
.064" |
1.6 |
| 12 |
.082" |
2.0 |
| 10 |
.102" |
2.5 |
| 8 |
.125" |
3.0 |
| 6 |
.162" |
4.0 |
| 4 |
.204" |
5.0 |
| 2 |
.250" |
6.0 |
| 0 |
.312" |
8.0 |
| 00 |
.375" |
10.0 |
| 000 |
.500" |
12.7 |
|
| Inches |
Millimeters |
| 1/8 |
3.0 |
| 5/32 |
4.0 |
| 3/16 |
5.0 |
| 1/4 |
6.0 |
| 5/16 |
8.0 |
| 3/8 |
10.0 |
| 7/16 |
11.0 |
| 1/2 |
13.0 |
| 9/16 |
14.0 |
| 5/8 |
16.0 |
| 3/4 |
19.0 |
| 7/8 |
22.0 |
| 15/16 |
24.0 |
| 1 |
25.0 |
| 1-1/4 |
32.0 |
| 1-1/2 |
38.0 |
| 1-3/4 |
44.0 |
|
|
 |
Barbells - The shaft is measured in length (L)
between both balls. The thickness of the shaft is measured in gauge (G). The balls are measured by their outside diameter. |
 |
Captives or CBR - The size is measured at its largest inside diameter of the jewelry (D). The thickness of the bar is measured using gauge (G). |
 |
Labrets - The shaft is measured between the flat disc and ball (L). The thickness of the bar is measured using gauge (G). |
 |
Circular Barbell - Like the Captive, the size is measured at its largest inside diameter of the jewelry (D). The thickness of the bar is measured using gauge (G). |
 |
Curved Barbells or Bananas - The shaft is measured in length (L)
between both balls. The thickness of the shaft is measured in gauge (G). The balls are measured by their outside diameter. |
 |
Nose Screws - The length is measured on the inside of the screw from the bottom of the ball down to the bend (L).
The thickness of the shaft is measured in gauge (G). |
 |
Plugs and Tunnels - The outside diameter relates to the thickness or gauge of the piercing (G).
The length of the plug or tunnel is measured from rim to rim on the inside, which is called the wearable area (L). |
|
