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Ring sizes
Size conversion
| mm | UK | EU | US |
| 48.7 | J | 10 | 4 3/4 |
| 49.3 | J 1/2 | 10/11 | 5 |
| 50 | K | 11 | 5 1/4 |
| 50.6 | K 1/2 | 12 | 5 1/2 |
| 51.2 | L | 12/13 | 5 3/4 |
| 51.9 | L 1/2 | 13 | 6 |
| 52.5 | M | 14 | 6 1/4 |
| 53.1 | M 1/2 | 14/15 | 6 1/2 |
| 53.8 | N | 15 | 6 3/4 |
| 54.4 | N 1/2 | 15/16 | 7 |
| 55.1 | O | 16 | 7 1/4 |
| 55.7 | O 1/2 | 17 | 7 1/2 |
| 56.3 | P | 17/18 | 7 3/4 |
| 57 | P 1/2 | 18 | 8 |
| 57.6 | Q | 18/19 | 8 1/4 |
What is my ring size?
Getting the ring size right is critical for your comfort and not always straightforward, here are our tips:- Visit a local jeweler to measure your finger size if possible
- Measure the circumferences of your finger and refer to our ring-sizing guide above
- Select a ring that you already own and that fits the intended finger; measure the inside diameter of the ring and match the measurement to the conversion chart.
- It is best to measure your finger size at the end of the day and when your fingers are warm. Fingers are smaller in the early morning and when cold. Measure finger size 3 to 4 times to eliminate an erroneous reading.
- Rings with a particularly thick band feel tighter than a thin band; in these cases, we recommend buying a full size larger than your normal ring size. If you wear a half size and a ring is not available in the half sizes, choose the next size larger.
Tips for buying a ring as a surprise
- Ask their friends if they know the ring size
- Borrow (end justifies the means in this case ;-) the ring and measure its inside diameter
- Avoid guessing if at all possible
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