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Determine your ring size
Conversion for International Ring Sizes
Use this chart to convert your local standard to the US ring sizes for ordering, you can also calculate the size from millimeters as well.
| US Size | Dia. -inch | Dia. in MM | Metric -MM | British | French | German | Japanese | Swiss | - |
|---|---|---|---|---|---|---|---|---|---|
| 0000 | .390 | 9.91 | - | ||||||
| 00 | .422 | 10.72 | - | ||||||
| 0 | .454 | 11.53 | - | ||||||
| 1/2 | .474 | 11.95 | A | ||||||
| 3/4 | .482 | 12.18 | A 1/2 | ||||||
| 1 | .487 | 12.37 | 38.9 | B | 1 | ||||
| 1 1/4 | - | 12.60 | 39.6 | B 1/2 | |||||
| 1 1/2 | .503 | 12.78 | 40.2 | C | |||||
| 1 3/4 | - | 13.00 | 40.8 | C 1/2 | |||||
| 2 | .520 | 13.21 | 41.5 | D | 41 1/2 | 13 1/2 | 2 | 1 1/2 | |
| 2 1/4 | - | 13.41 | 42.1 | D 1/2 | - | - | |||
| 2 1/2 | .536 | 13.61 | 42.7 | E | 42 3/4 | 13 3/4 | 3 | 2 3/4 | |
| 2 3/4 | - | 13.83 | 43.4 | E 1/2 | - | - | |||
| 3 | .553 | 14.05 | 44.0 | F | 44 | 14 | 4 | 4 | |
| 3 1/8 | - | 14.15 | 44.3 | F 1/2 | - | - | |||
| 3 1/4 | - | 14.25 | 44.6 | - | - | - | |||
| 3 3/8 | - | 14.36 | 44.9 | G | 45 1/4 | - | 5 | 5 1/4 | |
| 3 1/2 | .569 | 14.45 | 45.2 | - | - | 14 1/2 | |||
| 3 5/8 | - | 14.56 | 45.6 | G 1/2 | - | 6 | |||
| 3 3/4 | - | 14.65 | 45.9 | H | 46 1/2 | 6 1/2 | |||
| 4 | .585 | 14.86 | 46.5 | H 1/2 | - | 15 | 7 | ||
| 4 1/4 | - | 15.04 | 47.1 | I | 47 3/4 | 7 3/4 | |||
| 4 1/2 | .601 | 15.27 | 47.8 | I 1/2 | - | 15 1/4 | 8 | ||
| 4 5/8 | - | 15.40 | 48.1 | J | 49 | 15 1/2 | 9 | ||
| 4 3/4 | - | 15.53 | 48.4 | - | - | ||||
| 5 | .618 | 15.70 | 49.0 | J 1/2 | - | 15 3/4 | 9 | ||
| 5 1/8 | - | 15.80 | 49.3 | K | 50 | 10 | |||
| 5 1/4 | - | 15.90 | 49.6 | - | - | ||||
| 5 3/8 | - | 16.0 | 50.0 | K 1/2 | - | 10 | |||
| 5 1/2 | .634 | 16.10 | 50.3 | L | 51 3/4 | 16 | 11 3/4 | ||
| 5 3/4 | - | 16.30 | 50.9 | - | - | ||||
| 5 7/8 | - | 16.41 | 51.3 | L 1/2 | - | ||||
| 6 | .650 | 16.51 | 51.5 | M | 52 3/4 | 16 1/2 | 12 | 12 3/4 | |
| 6 1/4 | - | 16.71 | 52.2 | M 1/2 | - | ||||
| 6 1/2 | .666 | 16.92 | 52.8 | N | 54 | 17 | 13 | 14 | |
| 6 3/4 | - | 17.13 | 53.4 | N 1/2 | - | ||||
| 7 | .683 | 17.35 | 54.0 | O | 55 1/4 | 17 1/4 | 14 | 15 1/4 | |
| 7 1/4 | - | 17.45 | 54.7 | O 1/2 | - | ||||
| 7 1/2 | .699 | 17.75 | 55.3 | P | 56 1/2 | 17 3/4 | 15 | 16 1/2 | |
| 7 3/4 | - | 17.97 | 55.9 | P 1/2 | - | ||||
| 8 | .716 | 18.19 | 56.6 | Q | 57 3/4 | 18 | 16 | 17 3/4 | |
| 8 1/4 | - | 18.35 | 57.2 | Q 1/2 | - | ||||
| 8 1/2 | .732 | 18.53 | 57.8 | - | - | 18 1/2 | 17 | ||
| 8 5/8 | - | 18.61 | 58.4 | R | 59 | 19 | |||
| 8 3/4 | - | 18.69 | 58.4 | - | - | ||||
| 8 7/8 | - | 18.80 | 59.0 | R 1/2 | - | ||||
| 9 | .748 | 18.89 | 59.1 | - | - | 19 | 18 | ||
| 9 1/8 | - | 19.10 | 59.4 | S | 60 1/4 | 20 1/4 | |||
| 9 1/4 | - | 19.22 | 59.7 | - | - | ||||
| 9 3/8 | - | 19.31 | 60.0 | S 1/2 | - | ||||
| 9 1/2 | .764 | 19.41 | 60.3 | - | - | 19 1/2 | 19 | ||
| 9 5/8 | - | 19.51 | 60.6 | T | 61 1/2 | 21 1/2 | |||
| 9 3/4 | - | 19.62 | 60.9 | - | - | ||||
| 10 | .781 | 19.84 | 61.6 | T 1/2 | - | 20 | 20 | ||
| 10 1/4 | - | 20.02 | 62.2 | U | 62 3/4 | 21 | 22 3/4 | ||
| 10 1/2 | .797 | 20.20 | 62.8 | U 1/2 | - | 20 1/4 | 22 | ||
| 10 5/8 | - | 20.32 | 63.1 | V | 63 | 23 3/4 | |||
| 10 3/4 | - | 20.44 | 63.5 | - | - | ||||
| 11 | .814 | 20.68 | 64.1 | V 1/2 | - | 20 3/4 | 23 | ||
| 11 1/8 | - | 20.76 | 64.3 | W | 65 | 25 | |||
| 11 1/4 | - | 20.85 | 64.7 | - | - | ||||
| 11 3/8 | - | 20.94 | 65.0 | W 1/2 | - | ||||
| 11 1/2 | - | 21.08 | 65.3 | - | - | 21 | 24 | ||
| 11 5/8 | .830 | 21.18 | 65.7 | X | 66 1/4 | 26 1/4 | |||
| 11 3/4 | - | 21.24 | 66.0 | - | - | ||||
| 11 7/8 | - | 21.30 | 66.3 | X 1/2 | - | ||||
| 12 | .846 | 21.49 | 66.6 | Y | 67 1/2 | 21 1/4 | 25 | 27 1/2 | |
| 12 1/4 | - | 21.69 | 67.2 | Y 1/2 | - | ||||
| 12 1/2 | .862 | 21.89 | 67.9 | Z | 68 3/4 | 21 3/4 | 26 | 28 3/4 | |
| 12 3/4 | - | 22.10 | 68.5 | Z 1/2 | - | ||||
| 13 | .879 | 22.33 | 69.1 | - | - | 22 | 27 |
Determining Your Ring Size
If you don't know your ring size follow these instructions and you will be able to determine it.
1. Cut a strip of paper no wider than 1/4" .
2. Wrap the paper snugly around your finger and mark the paper where it meets.
3. Measure the marked length of paper and compare it to the chart below.
Note: If your knuckle is significantly larger than the base of your finger, you should measure the knuckle as described above and pick a size somewhere in between.
This should give you a good idea of your ring size.
| Ring Size | Paper Length (Inches) |
| 4 | 1 13/16 |
| 5 | 1 15/16 |
| 6 | 2 1/16 |
| 7 | 2 2/16 |
| 8 | 2 4/16 |
| 9 | 2 5/15 |
| 10 | 2 7/16 |
| 11 | 2 9/16 |
| 12 | 2 10/16 |
| 13 | 2 12/16 |
| 14 | 2 14/16 |