US & UK Ring Size Guide
US & UK Ring Size Guide
Getting your ring size right is the single most important step before ordering. Rings can be resized by a jeweller, but starting with the correct size saves time and avoids unnecessary work on a new piece. Here's everything you need to measure accurately at home, with both US and UK sizes.
US & UK Ring Size Chart
All Qutahia rings are handmade to UK alphabetical sizing (J through U). Use the table below to find your equivalent US numeric size, or match the inner diameter or circumference of an existing ring.
| US Size | UK Size | Inner Diameter (mm) | Inner Circumference (mm) |
|---|---|---|---|
| 4.75 | J | 15.9 | 49.9 |
| 5.25 | K | 16.3 | 51.2 |
| 5.75 | L | 16.7 | 52.5 |
| 6.25 | M | 17.1 | 53.8 |
| 6.75 | N | 17.5 | 55.1 |
| 7.25 | O | 17.9 | 56.3 |
| 7.75 | P | 18.4 | 57.6 |
| 8.25 | Q | 18.8 | 58.9 |
| 8.75 | R | 19.2 | 60.2 |
| 9.25 | S | 19.6 | 61.5 |
| 9.75 | T | 20.0 | 62.8 |
| 10.25 | U | 20.4 | 64.1 |
How to Measure Your Ring Size at Home
Method 1 — Use an existing ring
This is the most accurate home method. Take a ring that fits the correct finger and measure the inside diameter with a ruler. Match that measurement to the chart above.
Method 2 — Measure your finger
- Cut a thin strip of paper or use a piece of string approximately 10cm long.
- Wrap it snugly around the base of the finger you intend to wear the ring on.
- Mark or pinch the point where the paper meets itself.
- Lay it flat and measure the length in millimetres — this is your inner circumference.
- Match that number to the circumference column in the chart above.
Important Tips
- Measure at the end of the day. Fingers are slightly larger in the evening due to natural swelling from warmth and activity. A ring sized in the morning may feel tight by evening.
- Avoid measuring when cold. Cold temperatures cause fingers to shrink. If your hands are cold, warm them first.
- Check the knuckle. If your knuckle is wider than the base of your finger, size up and choose a ring style with a slight taper — it will pass the knuckle but sit snugly at the base.
- Wider bands fit tighter. A wide band (over 5mm) sits higher on the finger and will feel tighter than a slim band of the same size. If ordering a wider band, consider going half a size up.
Need a Size Outside This Range?
We offer bespoke sizing for fingers outside this range. When placing your order, select "Other (please specify)" from the ring size dropdown and enter your size — either a US number, a UK letter, or a circumference in millimetres. Our team will contact you to confirm before production begins.
Still Not Sure?
The easiest and most reliable way to find your ring size is to visit any local jeweller — most will measure your finger for free in under a minute. Alternatively, contact us and we'll help you work it out before you order.