Ring Size Guide
Finding the right ring size is important for both comfort and style. Use this chart to compare US ring sizes with inner diameter and circumference in milli-meters.
🔢 Ring Size Conversion Chart
| US Size | UK Size | EU Size | Inner Diameter (mm) | Finger Circumference (mm) |
|---|---|---|---|---|
| 3 | F | 44 | 14.1 mm | 44.2 mm |
| 3.5 | G | 45 | 14.5 mm | 45.5 mm |
| 4 | H | 46.5 | 14.9 mm | 46.8 mm |
| 4.5 | I | 47.5 | 15.3 mm | 48.0 mm |
| 5 | J | 49 | 15.7 mm | 49.3 mm |
| 5.5 | K | 50 | 16.1 mm | 50.6 mm |
| 6 | L | 51.5 | 16.5 mm | 51.8 mm |
| 6.5 | M | 52.5 | 16.9 mm | 53.1 mm |
| 7 | N | 54 | 17.3 mm | 54.4 mm |
| 7.5 | O | 55.5 | 17.7 mm | 55.7 mm |
| 8 | P | 57 | 18.1 mm | 57.0 mm |
| 8.5 | Q | 58 | 18.5 mm | 58.3 mm |
| 9 | R | 59.5 | 18.9 mm | 59.5 mm |
| 9.5 | S | 60.5 | 19.3 mm | 60.8 mm |
| 10 | T | 62 | 19.7 mm | 62.1 mm |
| 10.5 | U | 63 | 20.1 mm | 63.4 mm |
| 11 | V | 64.5 | 20.6 mm | 64.6 mm |
| 11.5 | W | 66 | 21.0 mm | 65.9 mm |
| 12 | X | 67.5 | 21.4 mm | 67.2 mm |
📐 How to Measure Your Ring Size
🧵 Option 1: Use a string or strip of paper
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Wrap it around the base of your finger
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Mark where it overlaps
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Measure the length (in mm) = your finger circumference
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Use the table above to find the matching US size
💍 Option 2: Measure a ring you already wear
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Place it on a ruler
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Measure the inner diameter
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Match the size in the table above
✅ Tips for Accurate Sizing
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Measure at the end of the day (fingers are slightly larger)
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Avoid measuring when your hands are cold (fingers shrink)
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For wide bands, go half a size up
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If you're between sizes, choose the larger one for comfort
🎁 Popular Ring Sizes by Demographic
| Group | Common US Sizes |
|---|---|
| Women (petite) | 4–5.5 |
| Women (average) | 6–7.5 |
| Women (taller/bigger hands) | 8–9.5 |
| Men (average) | 9–11 |
| Teens (girls) | 4–6 |
| Teens (boys) | 7–9 |