1. Choose the right ring
Use a round ring that fits the same finger comfortably. A distorted or very wide band can give a misleading result.
Ring Size Guide
The Facetelle guide
Ring Size Guide
Measure carefully, compare in millimetres and leave a little room for the way your hands change through the day.
The most reliable option
A professional finger measurement is the best starting point, especially for a wide band, an unusual profile or a ring that will sit beside another. Measure the intended finger: the same finger on the other hand may not be the same size.
Measure a ring that already fits
2. Measure inside edge to inside edge
Place it on a ruler and measure the widest internal diameter in millimetres. Do not include the metal.
3. Compare with the chart
Use the nearest inside diameter. If your reading sits between sizes, ask Facetelle to confirm the best option for the design.
Measure your finger
- Wrap a narrow strip of paper around the base of the intended finger. It should be comfortably close, not tight.
- Mark where the strip overlaps, then measure that length in millimetres. This is the approximate inside circumference.
- Repeat two or three times, including once later in the day. Avoid measuring when your hands are unusually cold, hot or swollen.
Between sizes? The larger size is usually the safer home-measurement choice, but band width, profile and knuckle size matter. Ask Facetelle before ordering rather than relying on a conversion alone.
UK ring sizes
| UK size | Inside diameter (mm) | Inside circumference (mm) |
|---|---|---|
| H | 14.9 | 46.8 |
| I | 15.3 | 48.0 |
| J | 15.5 | 48.7 |
| K | 15.9 | 50.0 |
| L | 16.3 | 51.2 |
| M | 16.7 | 52.5 |
| N | 17.1 | 53.8 |
| O | 17.5 | 55.1 |
| P | 17.9 | 56.3 |
| Q | 18.2 | 57.2 |
| R | 18.6 | 58.9 |
| S | 19.2 | 60.2 |
| T | 19.5 | 61.4 |
| U | 20.0 | 62.7 |
| V | 20.4 | 64.0 |
| W | 20.8 | 65.3 |
| X | 21.2 | 66.6 |
| Y | 21.6 | 67.8 |
| Z | 21.8 | 68.5 |
Checked against Goldsmiths’ UK size chart.
A discreet measurement for a proposal
Borrow a ring worn on the correct finger and measure its inside diameter, or ask someone they trust to help. A ring worn on another finger is only a clue. If certainty matters, choose the setting and diamond first, then confirm the size with Facetelle before the order is finalised.
Read the proposal guide