Measuring Earrings Diameter (size)
An earring can be measured by its 2 diameters: inner diameter and outer diameter (since earring is made of wire which has some thickness).
All our piercing hoops are measured by their INNER diameter. Please take a look at the picture below.
We measure diameters in millimeters (mm), but in the US common unit of measure is inch.
One inch equals to 25.4mm. Here is the table of approximate millimeters to inch conversion:
Please take a look at the picture below to see what are the different hoop sizes we usually make.
And here are schemes with common sizes for different piercing types.
1) Earrings size chart:
2) Nose/Lip rings size chart:
3) Septum rings size chart: