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Ring Size Converter
Find your US ring size from a ring's inner diameter or your finger's circumference, and convert to EU/ISO sizes.
Tip from Tink: Fingers swell when warm; measure at room temperature.
US / Canada
7
Inner diameter
17.3 mm
Circumference
54.4 mm
EU / ISO
54
Measure an existing ring's inside edge, or wrap a strip of paper around your finger for the circumference.
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How to use the Ring Size Converter
- Choose diameter, circumference or US size.
- Enter the measurement in millimeters.
- Read your size in every system.
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