| Circle circumference | Inner circle diameter | Japan | MainlandChina | HongKong | USA | UK,AUS | EUR |
| （mm） | （mm） | ||||||
| 40.8 | 13 | 1 | 1 | Ｃ | 41 | ||
| 41.9 | 13 1/3 | 2 | 2 | D | 42 | ||
| 42.9 | 13 2/3 | 3 | 3 | 5 | 2.5 | E | 43 |
| 44 | 14 | 4 | 4 | 6 | 3 | F | 44 |
| 45 | 14 1/3 | 5 | 5.5 | 7 | 3.5 | G | 45 |
| 46.1 | 14 2/3 | 6 | 6.5 | 8 | 3.5～4 | G～Ｈ | 46 |
| 47.1 | 15 | 7 | 8 | 9 | 4～4.5 | Ｈ～Ｉ | 47 |
| 48.2 | 15 1/3 | 8 | 9 | 10 | 4.5～5 | Ｉ～Ｊ | 48 |
| 49.2 | 15 2/3 | 9 | 10 | 11 | 5 | Ｊ | 49 |
| 50.3 | 16 | 10 | 11 | 12 | 5.5 | Ｋ | 50 |
| 51.3 | 16 1/3 | 11 | 12 | 13 | 6 | Ｌ | 51 |
| 52.4 | 16 2/3 | 12 | 13 | 14 | 6.5 | Ｌ～Ｍ | 52 |
| 53.4 | 17 | 13 | 13.5 | 14.5 | 6.5～7 | Ｍ～Ｎ | 53 |
| 54.5 | 17 1/3 | 14 | 15 | 15.5 | 7～7.5 | Ｎ～Ｏ | 54 |
| 55.5 | 17 2/3 | 15 | 16 | 16.5 | 7.5～8 | Ｏ～Ｐ | 55 |
| 56.5 | 18 | 16 | 17 | 17.5 | 8 | Ｐ | 56 |
| 57.6 | 18 1/3 | 17 | 18.5 | 18.5 | 8.5 | Ｑ | 57 |
| 58.6 | 18 2/3 | 18 | 19.5 | 19.5 | 9 | Ｒ | 58 |
| 59.7 | 19 | 19 | 20.5 | 20.5 | 9.5 | Ｓ | 59 |
| 60.7 | 19 1/3 | 20 | 21.5 | 21.5 | 10 | Ｔ | 60 |
| 61.8 | 19 2/3 | 21 | 22 | 22 | 10～10.5 | Ｔ～Ｕ | 61 |
| 62.8 | 20 | 22 | 23 | 23 | 10.5 | Ｕ | 62 |
| 63.9 | 20 1/3 | 23 | 24 | 24 | 11 | Ｖ | 63 |
| 64.9 | 20 2/3 | 24 | 25 | 25 | 11.5 | Ｗ | 64 |
| 66 | 21 | 25 | 26 | 26 | 12 | Ｘ | 65 |
| 67 | 21.4 | 26 | 27.5 | 27 | 12.5 | Ｙ | 66 |
| 68 | 21.7 | 27 | 28.5 | 28 | 13 | Ｚ | 67 |
| 69 | 22 | 28 | 30 | 29 | 13.5 | 68 | |
| 70 | 22.4 | 29 | 30 | 14 | 69 | ||
| 71.2 | 22.7 | 30 | 14.5 | 70 |
- by LiZifang
RingSizer
- by LiZifang
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