Ring Size Converter
Convert ring sizes between US, UK, EU (mm) and diameter measurements.
How to use
Enter your US ring size to see UK, EU and mm equivalents.
Frequently asked questions
How do I measure my ring size at home?
Wrap a strip of paper around the finger, mark it, and measure the mm — compare to the circumference column.
US vs UK sizes?
US uses numbers (3–13), UK uses letters (F–Z); EU uses inner circumference in mm.
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