All the jewelry we have on our Online Shop use either Gauge or Inches for the size.
Below you can find the Gauge and Inch to millimeter conversion table.
| ゲージ | mm |
| 20ga | 0.8mm |
| 18ga | 1mm |
| 16ga | 1.3mm |
| 14ga | 1.6mm |
| 12ga | 2mm |
| 10ga | 2.6mm |
| 8ga | 3.2mm |
| 6ga | 4mm |
| 4ga | 5mm |
| 2ga | 6.5mm |
| 0ga | 8.2mm |
| 00ga | 9.5mm |
| 000ga | 10.5mm |
| 0000ga | 11.7mm |
| インチ | mm |
| 1/8″ | 3.2mm |
| 5/32″ | 4mm |
| 3/16″ | 4.75mm |
| 7/32″ | 5.5mm |
| 1/4″ | 6.4mm |
| 5/16″ | 8mm |
| 3/8″ | 9.5mm |
| 7/16″ | 11mm |
| 1/2″ | 12.7mm |
| 9/16″ | 14.5mm |
| 5/8″ | 16mm |
| 11/16″ | 17.5mm |
| 3/4″ | 19mm |
| 13/16″ | 20.5mm |
| 7/8″ | 22mm |
| 15/16″ | 24mm |
| 1″ | 25.4mm |
| 1-1/16″ | 27mm |
| 1-1/8″ | 28.5mm |
| 1-3/16″ | 30mm |
| 1-1/4″ | 32mm |
| 1-5/16″ | 33.5mm |
| 1-3/8″ | 35mm |
| 1-7/16″ | 36.5mm |
| 1-1/2″ | 38mm |
| 1-9/16″ | 39.5mm |
| 1-5/8″ | 41mm |
| 1-11/16″ | 43mm |
| 1-3/4″ | 44.5mm |
| 1-13/16″ | 46mm |
| 1-7/8″ | 47.5mm |
| 1-15/16″ | 49mm |
| 2″ | 50.8mm |