Ring Size Conversion Chart
At Layla Diamonds we want your shopping journey to feel special from start to finish. Finding the right ring size is an important part of that experience — whether you’re celebrating a milestone engagement, saying ‘I do’ with a wedding band, or treating yourself to something beautiful for everyday wear. Our simple guide below will help you choose the perfect fit, so you can cherish your jewellery with confidence.
| UK Size | US Size | EU Size | Inner Circumference (mm) |
|---|---|---|---|
| G | 3.75 | 46 | 45.5 |
| G½ | 4 | 47 | 46 |
| H | 4.25 | 47 | 46.5 |
| H½ | 4.5 | 48 | 47 |
| I | 4.75 | 48 | 47.5 |
| I½ | 5 | 49 | 48 |
| J | 5.25 | 50 | 48.7 |
| J½ | 5.5 | 50 | 49.3 |
| K | 5.75 | 51 | 50 |
| K½ | 5.9 | 51 | 50.6 |
| L | 6 | 51 | 51.2 |
| L½ | 6.25 | 52 | 51.9 |
| M | 6.5 | 52 | 52.5 |
| M½ | 6.75 | 53 | 53.1 |
| N | 7 | 53 | 53.8 |
| N½ | 7.25 | 54 | 54.4 |
| O | 7.5 | 55 | 55.1 |
| O½ | 7.75 | 55 | 55.7 |
| P | 8 | 56 | 56.3 |
| P½ | 8.25 | 57 | 57 |
| Q | 8.5 | 57 | 57.6 |
| Q½ | 8.75 | 58 | 58.3 |
| R | 9 | 58 | 58.9 |
| R½ | 9.25 | 59 | 59.5 |
| S | 9.5 | 59 | 60.2 |
| S½ | 9.75 | 60 | 60.8 |
| T | 10 | 60 | 61.4 |
| T½ | 10.25 | 61 | 62.1 |
| U | 10.5 | 62 | 62.7 |
| U½ | 10.75 | 62 | 63.4 |
| V | 11 | 63 | 64 |
| V½ | 11.25 | 63 | 64.6 |
| W | 11.5 | 64 | 65.3 |
| W½ | 11.75 | 65 | 65.9 |
| X | 12 | 66 | 66.6 |
| X½ | 12.25 | 66 | 67.2 |
| Y | 12.5 | 67 | 67.8 |
| Y½ | 12.75 | 68 | 68.5 |
| Z | 13 | 69 | 69.1 |
