Please use this chart to measure your piercing. This will help you get your correct size.

Wearing jewellery of the correct size in your body piercing is important. Knowing how to measure yourself makes buying and choosing body-piercing jewellery quicker, safer and more convenient. If the body jewellery is too short for your piercing, it will aggravate the area, cause an excess of swelling and, possibly lead to infection. If it is too long, the body jewellery stands more chance of getting caught or snagged on clothes, fingers, hair, etc. This, in turn, will cause more aggravation and maybe even micro-tears in the tissue around the hole, which can lead to unnecessary scarring or infection.

Ball Closure Rings, Circular Barbells & Body Spirals
Ball closure rings are measured in two places. The 'Gauge' meaning the thickness of the ring, corresponds with the thickness of your piercing. The 'Internal Diameter' is the width of the inside of the ring at its widest point.

Barbells
Barbells also have two measurements. The 'Gauge' refers to the thickness of the barbell and must match the thickness of your piercing. The length of the barbell is measured as the distance in between the balls at either end.

Flesh tunnels, Plugs & Top Hats
Flesh tunnels, flesh plugs & top hats etc, are measured in outside diameter. This relates to the thickness of your piercing.
The length of the tunnel is measured from rim to rim.

Bananabells
The length of a bananabell is measured as the distance between the balls at either end. This relates to the distance between the holes in your piercing.
The 'Gauge' is the thickness of the bananabell, relating to the thickness of your piercing. Navel piercings however, are usually only in 1.6mm