Jewellery Guide
Find Your Ring Size
Getting the right size before you buy means a perfect fit first time. Use our guide below to measure at home — it takes under two minutes.
Two easy methods — use whichever you have to hand.
The Paper Strip Method
- 01Cut a thin strip of paper — roughly 10mm wide and 10cm long.
- 02Wrap it snugly around the base of the finger you'd like to wear the ring on. Make sure it passes over your knuckle comfortably.
- 03Mark where the ends meet with a pen, then lay the strip flat and measure the length in millimetres.
- 04That measurement is your circumference — match it to the table below to find your UK size.
Use paper, not string — string can stretch and give a reading that's slightly too small.
Measure an Existing Ring
- 01Find a ring that already fits the finger you're buying for. It must be a good fit — not too loose, not too tight.
- 02Place it flat on a ruler and measure the inner diameter — from the inside edge to the inside edge — in millimetres.
- 03Find that diameter in the table below to identify the corresponding UK size.
This method is ideal when buying a ring as a surprise gift — just borrow a ring from the right finger when the recipient isn't looking.
Size at a glance
Common ring sizes compared
Inner diameter shown — circles are to scale relative to each other.
Full conversion table
UK Ring Size Chart
| UK Size | US Size | Diameter (mm) | Circumference (mm) |
|---|---|---|---|
| D | 2 | 12.7 | 39.9 |
| E | 2½ | 13.1 | 41.1 |
| F | 3 | 13.4 | 42.0 |
| G | 3½ | 13.8 | 43.2 |
| H | 4 | 14.1 | 44.2 |
| I | 4½ | 14.5 | 45.5 |
| J | 5 | 14.8 | 46.5 |
| K | 5½ | 15.1 | 47.4 |
| L | 6 | 15.4 | 48.4 |
| M | 6½ | 15.7 | 49.3 |
| N | 7 | 16.1 | 50.5 |
| O | 7½ | 16.5 | 51.8 |
| P | 8 | 16.8 | 52.8 |
| Q | 8½ | 17.1 | 53.7 |
| R | 9 | 17.4 | 54.7 |
| S | 9½ | 17.8 | 55.9 |
| T | 10 | 18.2 | 57.1 |
| U | 10½ | 18.5 | 58.0 |
| V | 11 | 18.8 | 59.1 |
| W | 11½ | 19.1 | 60.0 |
| X | 12 | 19.4 | 61.0 |
| Z | 13 | 20.1 | 63.2 |
Highlighted rows indicate the most commonly purchased sizes for women in the UK (H–Q).
Before you measure
Tips for an accurate reading
- ✦
Measure later in the day
Fingers are naturally slightly larger in the evening. Measuring first thing in the morning may give a reading that's a size too small.
- ✦
Avoid cold fingers
Cold makes fingers shrink. Measure when your hands are warm — not straight after coming in from outside.
- ✦
Account for large knuckles
If your knuckle is wider than the base of your finger, size up. The ring needs to pass over the knuckle to sit at the base.
- ✦
Both hands differ
Your dominant hand is typically slightly larger. Always measure the specific finger you plan to wear the ring on.
Still unsure?
We're always happy to help
If you're buying a ring as a gift and can't measure, get in touch and we'll advise on the best approach. We can also size rings after purchase if needed — just contact us directly.