Ring Size Converter
Convert ring sizes between US, UK, EU, Japan, inner diameter, and inner circumference in millimeters.
Input Details
Estimated ResultApproximate
US 7
UK: N 1/2 | EU: 54 | JP: 14
Inner diameter 17.3mm, circumference 54.4mm.
Sizes and fits vary by brand, garment cut, and manufacturer elasticity. Use these calculated results as a starting point and always check the official brand size chart prior to purchase.
About Ring Size Converter
Convert ring sizes between US, UK, EU, Japan, inner diameter, and inner circumference in millimeters.
How to Use
- Select your starting ring size system or finger measurement (diameter/circumference).
- View exact conversions across US, UK (letters), EU, and Japanese charts.
Frequently Asked Questions
How do I measure my finger for ring size?
Wrap a strip of paper around the base of your finger, mark where it overlaps, and measure the length in millimeters for circumference.
What is a US ring size 7 in UK letter sizes?
A US size 7 corresponds to a UK size N 1/2 or EU size 54.