Ring Size Guide
Ring Size Guide
Three Easy Methods to Find Your Perfect Fit
1 How to Measure
Choose the method that works best for you
Method A — String or Paper Strip
- Cut a thin strip of paper or use a piece of non-stretchy string
- Wrap it snugly around the base of your finger — it should be comfortable but not loose
- Mark where the strip overlaps with a pen
- Lay the strip flat and measure the length in millimeters
- Divide by 3.14 to get the inner diameter, then match it to the size chart below
Method B — Using an Existing Ring
- Select a ring that fits the intended finger well
- Place it on a flat surface
- Measure the inner diameter (the widest point inside the ring) in millimeters
- Match the measurement to the size chart below
Method C — Visit a Local Jeweler
- Any jeweler can measure your ring size in seconds using a professional ring mandrel
- This is the most accurate method — especially recommended for engagement rings and wide bands
- Ask for your size in US sizing to match our chart
2 Ring Size Chart
US sizes with inner diameter and circumference
| US Size | Inner Diameter (mm) | Circumference (mm) | EU Size | UK Size |
|---|---|---|---|---|
| 4 | 14.9 | 46.8 | 46.8 | H |
| 4.5 | 15.3 | 48.0 | 48.0 | I |
| 5 | 15.7 | 49.3 | 49.3 | J ½ |
| 5.5 | 16.1 | 50.6 | 50.6 | K ½ |
| 6 | 16.5 | 51.8 | 51.8 | L ½ |
| 6.5 | 16.9 | 53.1 | 53.1 | M ½ |
| 7 Most Common | 17.3 | 54.4 | 54.4 | N ½ |
| 7.5 | 17.7 | 55.7 | 55.7 | O ½ |
| 8 | 18.1 | 57.0 | 57.0 | P ½ |
| 8.5 | 18.5 | 58.3 | 58.3 | Q ½ |
| 9 | 19.0 | 59.5 | 59.5 | R ½ |
| 9.5 | 19.4 | 60.8 | 60.8 | S ½ |
| 10 | 19.8 | 62.1 | 62.1 | T ½ |
3 Helpful Tips
For the most accurate measurement
Before You Measure
- Between two sizes? We recommend sizing up for a more comfortable fit.
- Wide band rings (over 6mm) typically require a half size larger than your standard size.
- Temperature matters — fingers swell in heat and shrink in cold. Measure at room temperature for the most accurate result.
- Time of day — fingers are slightly larger in the evening. For the best fit, measure in the afternoon.
- Dominant hand — your dominant hand is usually a half size larger than your other hand.