Jewelry Gauge Converter
Convert jewelry gauge numbers to diameter in mm and find out which piercings they suit.
How to use this tool
- Enter gauge in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your diameter and the full breakdown beneath it.
Look up the diameter in millimetres for any jewelry gauge and find which piercings it is used for.
Frequently asked questions
- What gauge is a standard earring?
- Most standard earrings are 20G (0.81 mm). Freshly pierced ear lobes are typically done at 18G (1.02 mm).