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Ring Size Converter
US · UK · EU · Japan · International · Circumference (mm) — perfect for online jewelry shopping
Converted Ring Size
54.0
EU
US 7 = EU 54
📏 How to Measure Your Ring Size
📎 Wrap a string around your finger
✏️ Mark where it overlaps
📏 Measure length in mm (circumference)
💍 Use the chart below to find your size
📊 Ring Size Conversion Chart (Women & Men)
US/CAUK/AUEUJapanIntlCirc (mm)Diameter
4H46.874746.814.9
5J49.394949.315.7
6L51.9115251.916.5
7N54.4135454.417.3
8P57.0155757.018.1
9R59.5176059.518.9
10T62.1196262.119.8
11V64.6216564.620.6
12W67.2236767.221.4
13Y69.7257069.722.2
💡 Pro Tips
🌡️ Measure at room temperature (fingers swell when hot)
⏰ Measure at the end of the day (fingers are largest)
📏 Measure 3-4 times for accuracy
💍 Wide bands need 0.5 size larger than thin bands
💍 7 sizing systems
📏 Circumference & diameter
🌍 International shopping
📊 Full conversion chart