Ring Size
Ring Size Chart With Different Countries Standard
| Inside Circumference MM | AU & UK | US & Canada | German, Asia | China, Japan |
| 37.54 | A | 1/2 | - | - |
| 38.86 | B | 1 | - | 1 |
| 40.15 | C | 1 1/2 | - | - |
| 41.5 | D | 2 | 13 1/2 | 2 |
| 42.76 | E | 2 1/2 | 13 3/4 | 3 |
| 44.14 | F | 3 | 14 | 4 |
| 45.11 | G | 3 3/8 | - | 5 |
| 45.74 | G 1/2 | 3 5/8 | - | 6 |
| 46.02 | H | 3 3/4 | - | - |
| 46.68 | H 1/2 | 4 | 15 | 7 |
| 47.25 | I | 4 1/4 | - | - |
| 47.97 | I 1/2 | 4 1/2 | 15 1/4 | 8 |
| 48.38 | J | 4 5/8 | 15 1/2 | - |
| 49.32 | J 1/2 | 5 | 15 3/4 | 9 |
| 49.64 | K | 5 1/8 | - | - |
| 50.27 | K 1/2 | 5 3/8 | - | 10 |
| 50.58 | L | 5 1/2 | 16 | - |
| 51.87 | M | 6 | 16 1/2 | 12 |
| 53.16 | N | 6 1/2 | 17 | 13 |
| 54.51 | O | 7 | 17 1/4 | 14 |
| 55.76 | P | 7 1/2 | 17 3/4 | 15 |
| 56.45 | P 1/2 | 7 3/4 | - | - |
| 57.15 | Q | 8 | 18 | 16 |
| 57.65 | Q 1/2 | 8 1/4 | - | - |
| 58.21 | Q 3/4 | 8 1/2 | 18 1/2 | 17 |
| 58.47 | R | 8 5/8 | - | - |
| 58.72 | R 1/4 | 8 3/4 | - | - |
| 59.06 | R 1/2 | 8 7/8 | - | - |
| 59.34 | R 3/4 | 9 | 19 | 18 |
| 60 | S | 9 1/8 | - | - |
| 60.38 | S 1/4 | 9 1/4 | - | - |
| 60.66 | S 1/2 | 9 3/8 | - | - |
| 60.98 | S 3/4 | 9 1/2 | 19 1/2 | 19 |
| 61.29 | T | 9 5/8 | - | - |
| 61.64 | T 1/4 | 9 3/4 | - | - |
| 62.33 | T 1/2 | 10 | 20 | 20 |
| 62.89 | U | 10 1/4 | - | 21 |
| 63.46 | U 1/2 | 10 1/2 | 20 1/4 | 22 |
| 63.84 | V | 10 5/8 | - | - |
| 64.21 | V 1/4 | 10 3/4 | - | - |
| 64.97 | V 1/2 | 11 | 20 3/4 | 23 |
| 65.22 | W | 11 1/8 | - | - |
| 65.5 | W 1/4 | 11 1/4 | - | - |
| 65.78 | W 1/2 | 11 3/8 | - | - |
| 66.22 | W 3/4 | 11 1/2 | 21 | 24 |
| 66.54 | X | 11 5/8 | - | - |
| 66.73 | X 1/4 | 11 3/4 | - | - |
| 66.92 | X 1/2 | 11 7/8 | - | - |
| 67.51 | Y | 12 | 21 1/4 | 25 |
| 68.14 | Y 1/2 | 12 1/4 | - | - |
| 68.77 | Z | 12 1/2 | 21 3/4 | 26 |