💍Ring Size Converter

Convert ring sizes between US, UK, EU and diameter/circumference in mm.

🆓 Free🔒 Secure⚡ Instant📱 Mobile-friendly🚫 No signup

Convert ring sizes online for free. US, UK, EU, and mm diameter/circumference.

System

Value

US7

UKN

EU / ISO54 mm

Diameter17.3 mm

Circumference54 mm

How to Use Ring Size Converter — Step by Step

1Enter your ring size in your local standard — US, UK, EU, or mm (inner diameter)
2Click 'Convert' — equivalent sizes in all international standards are shown
3Use a ring size chart or measure an existing ring's inner diameter in mm
4Copy the size for ordering rings from international jewellers

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