Ring Size Converter
Convert ring sizes between different standards.
US Size
7
UK Size
N
EU Size
54
Diameter (mm)
54.0
How to Do It Manually
Ring sizes are typically measured in US ring sizes (1–14), but other countries use different scales. Measure finger circumference or use a size chart.
Ring Size ≈ (finger circumference in mm − 36.5) / 1.75
Frequently Asked Questions
How do I measure my ring size?
Wrap string around your ring finger, mark the overlap, and measure against a ruler in mm. Or try rings at a jeweler.
Do sizes vary between metals?
Sometimes. Gold may fit differently than silver due to slight band differences. Try on when possible.