U
se our international ring size table to easily find out the size of your ring based on the inner diameter (∅ mm). The conversion table for rings below takes into account the measurements valid in Switzerland. It makes it easier for you to convert ring sizes commonly used in Europe (EU), England (UK), America and Canada (USA/CAN) or Japan (JPN).
In Switzerland, the ring size is given as the inner diameter in mm. A ring size 54 means that the inner diameter of the ring is 54 mm long.
Table for converting sizes commonly used in Switzerland (inner diameter ∅ mm):
| ∅ mm | CH | EU | ENG | USA/CAN | JPN |
|---|---|---|---|---|---|
| 12,7 | 40 | 0 | C | 1.4 (1) | 0,2 |
| 13,0 | 41 | 1 | C 1/2 | 1.8 (1-) | 1,1 |
| 13,3 | 42 | 2 | D 1/2 | 2.2 (2) | 2,1 |
| 13,7 | 43 | 3 | E 1/2 | 2.6 (2-) | 3,1 |
| 14,0 | 44 | 4 | F | 3.0 (2-) | 4,0 |
| 14,3 | 45 | 5 | G | 3.4 (3) | 5,0 |
| 14,6 | 46 | 6 | G 1/2 | 3.7 (3-) | 5,9 |
| 14,9 | 47 | 7 | H 1/2 | 4.1 (4) | 6,9 |
| 15,3 | 48 | 8 | I 1/2 | 4.5 (4-) | 7,8 |
| 15,6 | 49 | 9 | E | 4.9 (4-) | 8,8 |
| 15,9 | 50 | 10 | K | 5.3 (5) | 9,7 |
| 16,3 | 51 | 11 | K 1/2 | 5.7 (5-) | 10,7 |
| 16,6 | 52 | 12 | L 1/2 | 6.1 (6) | 11,6 |
| 16,9 | 53 | 13 | M 1/2 | 6.4 (6) | 12,6 |
| 17,2 | 54 | 14 | N | 6.8 (6-) | 13,6 |
| 17,5 | 55 | 15 | W | 7.2 (7) | 14,5 |
| 17,8 | 56 | 16 | P | 7.6 (7-) | 15,5 |
| 18,2 | 57 | 17 | P 1/2 | 8.0 (7-) | 16,4 |
| 18,5 | 58 | 18 | Q 1/2 | 8.4 (8) | 17,4 |
| 18,8 | 59 | 19 | R | 8.7 (8-) | 18,3 |
| 19,1 | 60 | 20 | E | 9.1 (9) | 19,3 |
| 19,4 | 61 | 21 | T | 9.5 (9-) | 20,2 |
| 19,7 | 62 | 22 | T 1/2 | 9.9 (9-) | 21,2 |
| 20,1 | 63 | 23 | U 1/2 | 10.3 (10) | 22,2 |
| 20,4 | 64 | 24 | V | 10.7 (10-) | 23,1 |
| 20,7 | 65 | 25 | D | 11.0 (11) | 24,1 |
| 21,0 | 66 | 26 | X | 11.4 (11) | 25,0 |
| 21,3 | 67 | 27 | X 1/2 | 11.8 (11-) | 26,0 |
| 21,6 | 68 | 28 | Y 1/2 | 12.2 (12) | 26,9 |
| 22,0 | 69 | 29 | Z 1/2 | 12.6 (12-) | 27,9 |
| 22,3 | 70 | 30 | Z +1 | 13.0 (12-) | 28,8 |
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