Conversion hub
All ring size conversions
Pick a system pair, or jump straight to your size.
By system Convert between labelled systems, diameter, circumference and country scales.
See the full international ring size chart Every generated page uses the same canonical table as the main converter.
Measure If a result lands between sizes, switch from lookup to measurement before buying.
I do not know the sizing system
Enter the label printed on a ring, box, receipt, or measurement. Optional context ranks supported interpretations but never hides another plausible system.
By system
- US to UK
- UK to US
- US to EU
- EU to US
- US to Japan
- Japan to US
- UK to EU
- EU to UK
- US to Switzerland
- Switzerland to US
- UK to Japan
- EU to Japan
- Australia to US
- US to Australia
- Australia to EU
- EU to Australia
- France to US
- US to France
- Germany to US
- US to Germany
- France to UK
- Germany to UK
US to UK by size
- US 3 to UK
- US 3.5 to UK
- US 4 to UK
- US 4.5 to UK
- US 5 to UK
- US 5.5 to UK
- US 6 to UK
- US 6.5 to UK
- US 7 to UK
- US 7.5 to UK
- US 8 to UK
- US 8.5 to UK
- US 9 to UK
- US 9.5 to UK
- US 10 to UK
- US 10.5 to UK
- US 11 to UK
- US 11.5 to UK
- US 12 to UK
- US 12.5 to UK
- US 13 to UK
US to EU by size
- US 3 to EU
- US 3.5 to EU
- US 4 to EU
- US 4.5 to EU
- US 5 to EU
- US 5.5 to EU
- US 6 to EU
- US 6.5 to EU
- US 7 to EU
- US 7.5 to EU
- US 8 to EU
- US 8.5 to EU
- US 9 to EU
- US 9.5 to EU
- US 10 to EU
- US 10.5 to EU
- US 11 to EU
- US 11.5 to EU
- US 12 to EU
- US 12.5 to EU
- US 13 to EU
US to Japan by size
- US 3 to Japan
- US 3.5 to Japan
- US 4 to Japan
- US 4.5 to Japan
- US 5 to Japan
- US 5.5 to Japan
- US 6 to Japan
- US 6.5 to Japan
- US 7 to Japan
- US 7.5 to Japan
- US 8 to Japan
- US 8.5 to Japan
- US 9 to Japan
- US 9.5 to Japan
- US 10 to Japan
- US 10.5 to Japan
- US 11 to Japan
- US 11.5 to Japan
- US 12 to Japan
- US 12.5 to Japan
- US 13 to Japan
US to Switzerland by size
- US 3 to Switzerland
- US 3.5 to Switzerland
- US 4 to Switzerland
- US 4.5 to Switzerland
- US 5 to Switzerland
- US 5.5 to Switzerland
- US 6 to Switzerland
- US 6.5 to Switzerland
- US 7 to Switzerland
- US 7.5 to Switzerland
- US 8 to Switzerland
- US 8.5 to Switzerland
- US 9 to Switzerland
- US 9.5 to Switzerland
- US 10 to Switzerland
- US 10.5 to Switzerland
- US 11 to Switzerland
- US 11.5 to Switzerland
- US 12 to Switzerland
- US 12.5 to Switzerland
- US 13 to Switzerland
Or use the interactive converter and the full chart. Converter · Chart