Ring Size Guide
Ring Size Guide
Three Easy Methods to Find Your Perfect Ring Size
Visual Ring Sizer
Place a ring you own on screen and find the circle that matches its inner diameter. Ensure your screen zoom is at 100%.
Important Note
On-screen sizing is approximate. For the most accurate measurement, we recommend using a physical ring sizer or visiting a local jeweler.
How to Measure
The String Method
Cut a thin strip of paper or non-stretchy string. Wrap it snugly around the base of the finger where you will wear the ring. Mark where the ends meet.
Measure the Length
Lay the paper or string flat against a ruler and measure the length in millimeters. This gives you the circumference of your finger.
Find Your Size
Divide the circumference by 3.14 to get the diameter, then match it to the conversion table below to find your ring size.
The Existing Ring Method
Place a ring that fits well on a ruler and measure the inside diameter in millimeters. Match the measurement to the chart below.
Size Conversion Table
| US | EU | UK | Diameter (mm) | Circumference (mm) |
|---|---|---|---|---|
| 4 | 46.8 | H | 14.9 | 46.8 |
| 4.5 | 47.8 | I | 15.3 | 47.8 |
| 5 | 49.3 | J 1/2 | 15.7 | 49.3 |
| 5.5 | 50.3 | K 1/2 | 16.1 | 50.3 |
| 6 | 51.8 | L 1/2 | 16.5 | 51.8 |
| 6.5 | 52.8 | M 1/2 | 16.9 | 52.8 |
| 7 | 54.4 | N 1/2 | 17.3 | 54.4 |
| 7.5 | 55.4 | O 1/2 | 17.7 | 55.4 |
| 8 | 56.9 | P 1/2 | 18.1 | 56.9 |
| 8.5 | 57.9 | Q 1/2 | 18.5 | 57.9 |
| 9 | 59.5 | R 1/2 | 19.0 | 59.5 |
| 9.5 | 60.5 | S 1/2 | 19.4 | 60.5 |
| 10 | 62.1 | T 1/2 | 19.8 | 62.1 |
| 10.5 | 63.1 | U 1/2 | 20.2 | 63.1 |
| 11 | 64.6 | V 1/2 | 20.6 | 64.6 |
Pro Tips
Time of Day
Measure in the afternoon or evening when your fingers are at their largest natural size.
Temperature
Fingers shrink in cold weather and expand in heat. Measure at comfortable room temperature.
Dominant Hand
Your dominant hand is often slightly larger. Measure the specific finger and hand for the ring.
Wide Bands
Rings wider than 6mm fit tighter. If choosing a wide band, size up by half a size.
Buying a Surprise Gift?
- Borrow a ring she wears on the correct finger and trace its inner circle on paper
- Ask a close friend or family member who may know the size
- Use a ring she wears on her right hand as a close reference for the left
- When in doubt, size up slightly. Resizing down is easier than sizing up.