Size Guide
Ring Size Guide
Choosing the correct ring size is essential for comfort, security, and long-term wear, particularly for engagement rings and wedding bands. At Ashford & Blake, our rings are crafted using standard UK sizing.
To assist international clients, we’ve provided a full conversion chart including UK, Europe, US and China sizing equivalents.
Ring Size Conversion Chart
| Circumference (mm) | Inside Diameter (mm) | UK | Europe | US | China |
|---|---|---|---|---|---|
| 37.8 | 11.9 | A | – | 1/2 | – |
| 39.1 | 12.3 | B | – | 1 | – |
| 40.4 | 12.7 | C | – | 1 1/2 | – |
| 41.7 | 13.1 | D | 41 1/2 | 2 | – |
| 42.9 | 13.5 | E | 42 3/4 | 2 1/2 | – |
| 44.2 | 13.9 | F | 44 | 3 | – |
| 45.5 | 14.3 | G | 45 1/4 | 3 3/8 | – |
| 46.8 | 14.7 | H | 46 1/2 | 3 3/4 | 8 |
| 48.0 | 15.1 | I | 47 3/4 | 4 1/4 | 9 |
| 48.7 | 15.5 | J | 49 | 4 5/8 | 10 |
| 50.0 | 15.9 | K | 50 | 5 1/8 | 11 |
| 51.2 | 16.3 | L | 51 3/4 | 5 1/2 | 12 |
| 52.5 | 16.7 | M | 52 3/4 | 6 | 13 |
| 53.8 | 17.1 | N | 54 | 6 1/2 | – |
| 55.1 | 17.5 | O | 55 1/4 | 7 | – |
| 56.3 | 17.9 | P | 56 1/2 | 7 1/2 | 17 |
| 57.2 | 18.2 | Q | 57 3/4 | 8 | 18 |
| 58.9 | 18.6 | R | 59 | 8 5/8 | 19 |
| 60.2 | 19.1 | S | 60 1/4 | 9 1/8 | 20 |
| 61.4 | 19.5 | T | 61 1/2 | 9 5/8 | 21 |
| 62.7 | 20.0 | U | 62 3/4 | 10 1/4 | 23 |
| 64.0 | 20.3 | V | 63 | 10 5/8 | 24 |
| 65.3 | 20.7 | W | 65 | 11 1/8 | 25 |
| 66.6 | 21.1 | X | 66 1/4 | 11 5/8 | 26 |
| 67.8 | 21.5 | Y | 67 1/2 | 12 | 27 |
| 68.5 | 21.8 | Z | 68 3/4 | 12 1/2 | 28 |
How to Measure Your Ring Size
Option 1: Measure an Existing Ring
- Select a ring that fits the intended finger comfortably.
- Measure the inside diameter in millimetres (mm).
- Match your measurement to the chart above.
For accuracy, measure across the centre of the ring from inner edge to inner edge.
Option 2: Measure Your Finger
- Wrap a thin strip of paper or string around the base of your finger.
- Mark where the ends meet.
- Measure the length in millimetres — this is your finger circumference.
- Use the conversion chart to determine your UK ring size.
Ensure the strip is snug but not tight.
Professional Sizing Advice
For engagement rings or higher-value pieces, we strongly recommend professional sizing at a reputable jeweller to ensure precision.
Keep in mind:
- Fingers can expand in warmer temperatures and contract in colder conditions.
- Wider bands often feel tighter than slim bands.
- Your dominant hand may be slightly larger.
If you are purchasing a surprise gift and are unsure of the size, selecting a common size (UK L–N for women, UK R–T for men) can be adjusted later if required.
Resizing
Most rings can be resized within a limited range. However, certain designs including eternity rings, tension settings, or fully stone-set bands may have restrictions.
If you require assistance, our team at Ashford & Blake is available to guide you through sizing, adjustments, and bespoke modifications.