Ring Size Converter
Find the nearest US, UK, EU and Japanese ring size from inside diameter, circumference or a known US size.
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What Is the Ring Size Converter?
The Ring Size Converter matches an inside diameter, inside circumference or US size to a practical cross-system reference covering US/Canada, UK/Australia, EU/ISO and Japan. It also reports the selected ring's physical measurements.
How It Works
Choose what you measured, enter the value and review the nearest standard-size row. Copy or export the size report before confirming with a jeweler.
When to Use It
Use it for preliminary online-shopping comparisons or translating an existing ring size between regional systems.
Frequently Asked Questions
- Is The Result Guaranteed To Fit?
- No. Manufacturer tolerances, band width, temperature and measurement method affect fit. Confirm valuable or wide rings with a jeweler.
Found an issue? Send Feedback. See our data sources and update policy for tools that depend on changing information.
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