I make rings in UK sizes E to Z+, to order, so the size you give me is the size you get. This page has the conversion chart, three ways to measure at home, and the things that quietly throw a measurement off. If you only remember one thing: order in UK letters, not US numbers or millimetres, and I will make it to fit.
UK ring size chart with US and millimetre conversions
Measure the inside of a ring that already fits the right finger, straight across the middle from edge to edge, and read along the row. If you have a strip of paper wrapped round your finger instead, use the circumference columns. Figures are rounded to the nearest 0.1 mm; charts from different jewellers can differ by a fraction, so if you land between two sizes, see the notes below the table.
| UK size | Inside diameter (mm) | Inside circumference (mm) | Circumference (cm) | US size |
|---|---|---|---|---|
| A | 12.0 | 37.8 | 3.8 | ½ |
| B | 12.4 | 39.1 | 3.9 | 1 |
| C | 12.8 | 40.4 | 4.0 | 1½ |
| D | 13.2 | 41.7 | 4.2 | 2 |
| E | 13.6 | 42.9 | 4.3 | 2½ |
| F | 14.1 | 44.2 | 4.4 | 3 |
| G | 14.5 | 45.5 | 4.5 | 3½ |
| H | 14.9 | 46.8 | 4.7 | 4 |
| I | 15.3 | 48.0 | 4.8 | 4½ |
| J | 15.7 | 49.3 | 4.9 | 5 |
| K | 16.1 | 50.6 | 5.1 | 5½ |
| L | 16.5 | 51.9 | 5.2 | 6 |
| M | 16.9 | 53.1 | 5.3 | 6½ |
| N | 17.3 | 54.4 | 5.4 | 7 |
| O | 17.7 | 55.7 | 5.6 | 7½ |
| P | 18.1 | 57.0 | 5.7 | 8 |
| Q | 18.5 | 58.3 | 5.8 | 8½ |
| R | 19.0 | 59.5 | 6.0 | 9 |
| S | 19.4 | 60.8 | 6.1 | 9½ |
| T | 19.8 | 62.1 | 6.2 | 10 |
| U | 20.2 | 63.4 | 6.3 | 10½ |
| V | 20.6 | 64.6 | 6.5 | 11 |
| W | 21.0 | 65.9 | 6.6 | 11½ |
| X | 21.4 | 67.2 | 6.7 | 12 |
| Y | 21.8 | 68.5 | 6.8 | 12½ |
| Z | 22.2 | 69.7 | 7.0 | 13 |
So a finger measuring 6.5 cm around is a UK V or W; 5.5 cm around is a UK O; 5 cm is a UK J.
Three ways to find your size at home
1. Measure a ring you already own
The most reliable way. Take a ring that fits the finger you are buying for, measure the inside diameter in millimetres with a ruler, and match it to the chart. Be honest about which finger and which hand: ring fingers and middle fingers can differ by two sizes, and your dominant hand usually runs slightly larger.
2. Use a ring sizer
A ring sizer is a reusable plastic belt marked with UK letters. You slide it on, pull it snug and read the size. I post one out for £3, and it is the method I trust most when you do not have a ring to measure.
3. Ask a jeweller
Any high-street jeweller will measure your finger in thirty seconds. Ask for the UK size. The Journal post on measuring at home goes through each method in more detail.
What throws a measurement off
- Temperature and time of day. Cold fingers shrink and warm fingers swell. Measure at normal room temperature, ideally more than once across a day.
- Knuckles. If your knuckle is larger than the base of your finger, size up just enough for the ring to pass over it without spinning once it is on.
- Band width. Wide bands sit more snugly than slim ones. For my chunky hammered rings, go up half a size if you are between sizes; for slim stackers, take your usual size.
- Between sizes. Choose the larger one. A ring that is a fraction loose is comfortable; a ring that is a fraction tight is not.
Bangle sizes
My bangles come in three sizes: Small, 6 cm across (about 18 cm around); Medium, 6.5 cm (about 20 cm); Large, 7 cm (about 22 cm). Tuck your thumb into your palm as if you were putting a bangle on and measure the widest part of your hand. If you sit between sizes, get in touch and I will make one to your measurement.
If it does not fit
I can resize it. Get in touch and I will send you the address to post it to; resizing takes about ten working days from when it arrives. If you ordered the wrong size there is a small charge; if I made it wrong, it is free. More in the FAQ.