Ring Sizing Guide
Not sure about your ring size?
▶ Watch: How to Measure Your Ring SizeFind Your Perfect Fit
Use the methods below to find your size with confidence before you order.
Method 1 – String or Paper Strip
- Cut a thin strip of paper or use a piece of string about 6 inches long.
- Wrap it snugly around the base of the finger you plan to wear the ring on.
- Mark where the paper or string overlaps to complete the circle.
- Lay it flat and measure the length in millimeters.
- Match your measurement to the chart below.
Method 2 – Measure an Existing Ring
- Place a ring that already fits well on a flat surface.
- Measure the inside diameter (straight across the inside of the band) in millimeters.
- Match your measurement to the chart below.
Ring Size Chart
| US Size | Inside Circumference (mm) | Inside Diameter (mm) |
|---|---|---|
| 6 | 51.9 | 16.5 |
| 6.5 | 53.1 | 16.9 |
| 7 | 54.4 | 17.3 |
| 7.5 | 55.7 | 17.7 |
| 8 | 57.0 | 18.1 |
| 8.5 | 58.3 | 18.6 |
| 9 | 59.5 | 18.9 |
| 9.5 | 60.8 | 19.4 |
| 10 | 62.1 | 19.8 |
Tips for the Best Fit
- Measure at the end of the day — fingers are slightly larger in the evening and in warm weather.
- Measure the correct finger — ring sizes can vary between fingers and hands.
- When between sizes, size up — a slightly looser fit is more comfortable and easier to put on.
- Wide bands fit tighter — if you're ordering a wider band style, consider going up half a size.
Still Not Sure?
We're happy to help! Reach out via our Contact page and we'll guide you to the right size. Most Sterling Hearts rings are engraved with our 925 ♡SH mark inside the band as a sign of quality and authenticity. Some ready-to-ship styles may not include this mark.