Ring Sizing Chart
Ring Size Chart — How to Measure Ring Size
Engagement rings are often surprise gifts, and getting the size right first time is important. At Rêve Diamonds, we make this easy with a detailed sizing chart and practical measurement guidance. If you are unsure, our experts are always on hand to help — and we offer a complimentary first resize on all rings.
Tips Before You Measure a Ring Finger
- Measure your ring finger at normal body temperature. Fingers expand in heat and shrink in cold, so avoid measuring first thing in the morning or after exercise.
- If your knuckle is larger than the base of your finger, measure both and choose a size that slides comfortably over the knuckle. A ring that fits the knuckle will be slightly loose at the base — this is normal.
- If your measurement falls between two sizes, select the larger size. It is always easier to resize a ring smaller than to make it larger.
- Wider bands tend to fit tighter — you may need to go up half a size from your usual ring size.
- We offer complimentary finger sizers — contact us and we will send a set directly to your home, free of charge.
How Do I Measure a Ring Finger?
- Cut a piece of non-stretchy string or thin paper approximately 6 inches long and ¼ inch wide.
- Wrap it around the base of your finger (or over the knuckle if larger).
- Mark the point where the two ends meet with a pen.
- Lay the string or paper flat and measure the length in millimetres.
- Use the circumference measurement in the ring size chart below to find your UK ring size.
We recommend measuring your finger at the end of the day when fingers are at their largest. If in doubt, always size up — it is much easier to resize a ring smaller.
If you are in London, you are welcome to visit our Mayfair showroom at 14 Hanover Square for a professional ring sizing, completely free of charge and with no obligation to purchase.
Ring Size Chart
Download and print our ring size chart to find your ring size at home. Place an existing ring flat on the circles in the chart — the ring should sit just inside the circle with the grey line still visible around the edge. Match the circle to find your ring size.
DOWNLOAD RING SIZE CHART PDF| UK Size | USA / Canada | Diameter (mm) | Circumference (mm) |
|---|---|---|---|
| F | 3.0 | 13.92 | 43.65 |
| G | 3.5 | 14.31 | 44.90 |
| H | 4.0 | 14.70 | 46.20 |
| I | 4.5 | 15.09 | 47.45 |
| J | 5.0 | 15.87 | 48.70 |
| K | 5.5 | 15.90 | 49.95 |
| L | 6.0 | 16.26 | 51.25 |
| M | 6.5 | 16.65 | 52.45 |
| N | 7.0 | 17.04 | 53.70 |
| O | 7.5 | 17.45 | 55.00 |
| P | 8.0 | 17.86 | 56.25 |
| Q | 8.5 | 18.27 | 57.50 |
| R | 9.0 | 18.68 | 58.75 |
| S | 9.5 | 19.09 | 60.00 |
| T | 10.0 | 19.50 | 61.25 |
| U | 10.5 | 19.91 | 62.50 |
| V | 11.0 | 20.32 | 63.75 |
| W | 11.5 | 20.73 | 65.00 |
| X | 12.0 | 21.14 | 66.30 |
| Y | 12.5 | 21.55 | 67.50 |
| Z | 13.0 | 21.96 | 68.75 |
