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Note: For the most accurate method, please visit your local jeweler and ask them to size your finger, or use a specially made ring-sizing tool yourself.
The method below should only be considered an approximation.
Sizing Method:
1. Find a piece of string or strip of paper no wider than 20mm.
2. Wrap it around the base of your finger where the ring normally sits.
3. Use a pen to mark the point on the string/paper where it overlaps.
4. With a ruler, measure the length from the start of the string/paper to the pen mark.
5. Use this measurement and the chart below to determine your ring size.
Some tips to make your ring size measurement more accurate:
Measure your finger size at the end of the day when your fingers are usually largest.
Don't measure finger sizes when your hands are cold.
Since a wider ring covers more of your finger, you may find you need to order 1/4 to 1/2 sizes larger in this case.
If possible, have your finger measured several times on different days - this is the best way to get a true reading.
Ring Size Chart
| Ring Size (USA) |
Inside Diameter of ring (mm) |
length (mm) |
| 4 | 14.9 | 46.7 |
| 4.5 | 15.3 | 48.0 |
| 5 | 15.7 | 49.3 |
| 5.5 | 16.1 | 50.6 |
| 6 | 16.5 | 51.8 |
| 6.5 | 16.9 | 53.1 |
| 7 | 17.3 | 54.4 |
| 7.5 | 17.7 | 55.7 |
| 8 | 18.1 | 56.9 |
| 8.5 | 18.5 | 58.2 |
| 9 | 18.9 | 59.5 |
| 9.5 | 19.4 | 60.8 |
| 10 | 19.8 | 62.1 |
| 10.5 | 20.2 | 63.3 |
| 11 | 20.6 | 64.6 |
| 11.5 | 21.0 | 65.9 |
| 12 | 21.4 | 67.2 |
| 12.5 | 21.8 | 68.4 |
| 13 | 22.2 | 69.7 |
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