Ring Size Guide
Find your size in a minute
Measure a ring you already own on screen, enter a measurement in mm, or check the full international size chart.
Every screen renders sizes slightly differently. Take a standard bank or credit card and line its top and bottom edges up with the frame below — drag the slider until it matches.
Place your ring on the circle so its inner edge lines up with the line, then drag the slider until it fits.
Lay your ring directly on top of each circle below — like in the video — until you find the one its inner edge matches.
Wrap a strip of paper or string around your finger, mark where it overlaps, then measure that length with a ruler — that's your circumference. Or measure the inner diameter of a ring that already fits.
TR follows the same numbering as Japan (JP) — both are based on inner diameter. SE (Sweden) uses inner diameter directly in mm, the same figures as the Diameter column. A dash means that system has no defined size at that exact measurement.
| US/CA | UK/AU | EU | DE | CH | TR/JP | Diam. (mm) · SE | Circ. (mm) |
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This tool offers an approximate guide. If you're still not sure, feel free to contact us.