Typical Sizes by Piercing
| Piercing |
Common Gauge |
Typical Post Length* |
| Lobe |
16G–20G |
6–8mm |
| Helix |
16G–18G |
6–8mm |
| Forward Helix |
16G–18G |
6mm |
| Flat |
16G–18G |
6–8mm |
| Tragus |
16G–18G |
6mm |
| Conch |
16G |
6–8mm |
| Nostril |
18G–20G |
6–8mm |
*Typical sizes are a guide for healed piercings only. Anatomy and piercing placement vary, so your ideal post length may differ. Where possible, measure jewellery that already fits comfortably or ask your piercer.
Gauge / Thickness
| Gauge |
Thickness |
Commonly Used For |
| 20G |
0.8mm |
Fine piercing jewellery |
| 18G |
1.0mm |
Nose and some ear piercings |
| 16G |
1.2mm |
Common cartilage and flat back jewellery size |
| 14G |
1.6mm |
Thicker piercing jewellery |
Bar Length
| Length |
Fit |
| 4mm |
Very short / close fit |
| 6mm |
Close, neat fit for many healed piercings |
| 8mm |
More room and a slightly looser fit |
| 10mm |
Longer fit / additional room |
| 12mm+ |
Extra length where required |
How is length measured?
Bar length is measured along the wearable post only, not including the decorative top or flat back.

Everyone’s anatomy is different. If possible, measure a piece of jewellery that already fits you comfortably.