Below, you will find the sizes guide commonly used by professional drivers for piercings ear.
| Location | Diameter |
| Helix | 8mm / 10mm |
| Tragus | 6mm / 8mm |
| Conch | 10mm / 12mm |
| Anti helix | 5mm/6mm |
| Rook | 6mm |
| Daith | 8mm / 10mm |
| Labret / Medusa | 7mm / 8mm |
| Earlobe | 8mm / 10mm / 12mm |
