Ring sizes - Ring sizer
🔧 Interactive tool :Ring size calculator → — enter your finger circumference or diameter to instantly get your FR / US / UK ring size.
International ring size equivalence table:
| Diameter (mm) | FR / DE | US / CA | UK / AU | IT / ES | Japan |
|---|---|---|---|---|---|
| 14.0 | 44 | 1½ | D½ | 4 | — |
| 14.3 | 45 | 2 | E | 5 | — |
| 14.6 | 46 | 2½ | F | 6 | 1 |
| 15.0 | 47 | 3 | F½ | 7 | 2 |
| 15.3 | 48 | 3½ | G | 8 | 3 |
| 15.6 | 49 | 4 | H | 9 | 4 |
| 15.9 | 50 | 4½ | H½ | 10 | 5 |
| 16.2 | 51 | 5 | I | 11 | 6 |
| 16.5 | 52 | 5½ | J | 12 | 7 |
| 16.9 | 53 | 6 | K | 13 | 8 |
| 17.2 | 54 | 6½ | L | 14 | 9 |
| 17.5 | 55 | 7 | L½ | 15 | 10 |
| 17.8 | 56 | 7½ | M | 16 | 11 |
| 18.1 | 57 | 8 | N | 17 | 12 |
| 18.5 | 58 | 8½ | N½ | 18 | 13 |
| 18.8 | 59 | 9 | O | 19 | 14 |
| 19.1 | 60 | 9½ | P | 20 | 15 |
| 19.4 | 61 | 10 | P½ | 21 | 16 |
| 19.7 | 62 | 10½ | Q | 22 | 17 |
| 20.1 | 63 | 11 | R | 23 | 18 |
| 20.4 | 64 | 11½ | R½ | 24 | 19 |
| 20.7 | 65 | 12 | S | 25 | 20 |
| 21.0 | 66 | 12½ | T | 26 | 21 |
| 21.3 | 67 | 13 | T½ | 27 | 22 |
| 21.6 | 68 | 13½ | U | 28 | 23 |
Reference chart
And here is a more complete table with manufacturer ring sizes and their corresponding diameters and circumferences — the inner diameter is indicated:
| Maker size | Diameter (mm) | Circumference (mm) |
|---|---|---|
| 1 | 12,67 | 39,80 |
| 2 | 13,00 | 40,84 |
| 3 | 13,33 | 41,88 |
| 4 | 13,67 | 42,95 |
| 5 | 14,00 | 43,98 |
| 6 | 14,33 | 45,02 |
| 7 | 14,67 | 46,09 |
| 8 | 15,00 | 47,12 |
| 9 | 15,33 | 48,16 |
| 10 | 15,67 | 49,23 |
| 11 | 16,00 | 50,27 |
| 12 | 16,33 | 51,30 |
| 13 | 16,67 | 52,37 |
| 14 | 17,00 | 53,41 |
| 15 | 17,33 | 54,44 |
| 16 | 17,67 | 55,51 |
| 17 | 18,00 | 56,55 |
| 18 | 18,33 | 57,59 |
| 19 | 18,67 | 58,65 |
| 20 | 19,00 | 59,69 |
| 21 | 19,33 | 60,73 |
| 22 | 19,67 | 61,80 |
| 23 | 20,00 | 62,83 |
| 24 | 20,33 | 63,87 |
| 25 | 20,67 | 64,94 |
| 26 | 21,00 | 65,97 |
| 27 | 21,33 | 67,01 |
| 28 | 21,67 | 68,08 |
| 29 | 22,00 | 69,12 |
| 30 | 22,33 | 70,15 |
| 31 | 22,67 | 71,22 |
| 32 | 23,00 | 72,26 |
| 33 | 23,33 | 73,29 |
Print this ring gauge image (right-click and print at actual size: check that the scale measures exactly 10 centimetres!), then place a ring on it and find the matching circle. The inner diameter of the ring should just touch the outer edge of the circle.
If you are unsure between two ring sizes, choose the larger one to avoid it being too tight — resizing is always possible later.
