| Gauge | Inches | Millimeters |
| 20g | – | 0.8mm |
| 18g | – | 1mm |
| 16g | – | 1.2mm |
| 14g | – | 1.6mm |
| 12g | – | 2mm |
| 10g | – | 2.4mm |
| 8g | – | 3.2mm |
| 6g | – | 4mm |
| 4g | – | 5mm |
| 2g | – | 6.5mm |
| 0 g | – | 8mm |
| 00g | – | 10mm |
| – | 7/16″ | 11mm |
| – | 1/2″ | 12.5mm |
| – | 9/16″ | 14mm |
| – | 5/8″ | 16mm |
| – | 3/4″ | 19mm |
| – | 7/8″ | 22mm |
| – | 1″ | 25mm |
| – | 1-1/8″ | 28mm |
| – | 1-1/4″ | 32mm |
| – | 1-3/8″ | 35mm |
| – | 1-1/2″ | 38mm |
| – | 1-3/4″ | 44mm |
| – | 1-7/8″ | 48mm |
| – | 2″ | 51mm |
