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Ring Size Guide
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International Ring Size Conversion Chart
| Diameter (mm) | United States & Canada | Europe | UK & Australia | Singapore & Japan | Hong Kong | Switzerland |
| 14.1 | 3 | 44 | F 1/2 | 4 | 6 | 4 |
| 14.3 | 45 | G | 5 | 5 1/4 | ||
| 14.5 | 3.5 | G 1/2 | 7 | |||
| 14.7 | 46 | H | 6 | 6 1/2 | ||
| 14.9 | 4 | 47 | H 1/2 | 7 | 8 | |
| 15.1 | I | 7 3/4 | ||||
| 15.3 | 4.5 | 48 | I 1/2 | 8 | 9 | |
| 15.5 | J | 10 | 9 | |||
| 15.7 | 5 | 49 | J 1/2 | 9 | ||
| 15.9 | 50 | K | 11 | 10 | ||
| 16.1 | 5.5 | K 1/2 | 10 | |||
| 16.3 | 51 | L | 12 | 11 3/4 | ||
| 16.5 | 6 | 52 | L 1/2 | 11 | 13 | 12 3/4 |
| 16.7 | M | 12 | ||||
| 16.9 | 6.5 | 53 | M 1/2 | 13 | 14 | 14 |
| 17.1 | N | |||||
| 17.3 | 7 | 54 | N 1/2 | 14 | 15 | 15 1/4 |
| 17.5 | 55 | O |
|
16 | ||
| 17.7 | 7.5 | O 1/2 | 15 | 16 1/2 | ||
| 17.9 | 56 | P | 17 | |||
| 18.1 | 8 | 57 | P 1/2 | 16 | 17 3/4 | |
| 18.2 | 18 | |||||
| 18.3 | Q | |||||
| 18.5 | 8.5 | 58 | Q 1/2 | 17 | ||
| 18.8 | 59 | R | 19 | 19 | ||
| 19.0 | 9 | R 1/2 | 18 | 20 |
|
|
| 19.2 | 60 | S | 20 1/4 | |||
| 19.4 | 9.5 | 61 | S 1/2 | 19 | 21 | |
| 19.6 | T | 21 1/2 | ||||
| 19.8 | 10 | 62 | T 1/2 | 20 | 22 |
|
| 20.0 | U | 21 |
|
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| 20.2 | 10.5 | 63 | U 1/2 | 22 | 23 | 22 3/4 |
| 20.4 | 64 | V | 24 | |||
| 20.6 | 11 | V 1/2 | 23 |
|
||
| 20.8 | 65 | W | 25 | 25 | ||
| 21.0 | 11.5 | 66 | W 1/2 | 24 | ||
| 21.2 | X | 26 | ||||
| 21.4 | 12 | 67 | X 1/2 | 25 | 27 | 27 1/2 |
| 21.6 | Y |
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| 21.8 | 12.5 | 68 | Z | 26 | 28 3/4 | |
| 22.0 | 69 | Z 1/2 | ||||
| 22.2 | 13 | 70 | 27 | |||
| 22.4 | Z+1 | |||||
| 22.6 | 13.5 | Z+2 |