Ring Size Converter
Convert ring sizes between US, UK, EU and millimeter measurements.
–UK size
–EU (circ. mm)
–Diameter (mm)
–Diameter (in)
How to use
Enter a US size or millimeter diameter — all international sizes appear; everything runs in your browser.
Frequently asked questions
How do I measure my finger?
Wrap a strip of paper around the base of the finger, mark it, and measure the length in mm.
Do sizes differ between hands?
Yes — your dominant hand is usually half a size larger.
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