Metoda simpla: luati un inel pe care il purtati si pur si simplu masurati-i diametrul doar la deschiderea interioara, nu luati in calcul si grosimea inelului.
Corelati cu tabelul de mai jos pentru a afla circumferinta in mm.
| Nr. | Mărime | Diametrul (mm) | Circumferinta (mm) | Mărimi USA |
|---|---|---|---|---|
| 1 | 41 | 13.3 mm | 41 mm | 2 |
| 2 | 42 | 13.3 mm | 42 mm | 2 |
| 3 | 43 | 13.6 mm | 43 mm | 2.5 |
| 4 | 44 | 13.9 mm | 44 mm | 3 |
| 5 | 45 | 14.3 mm | 45 mm | 3 |
| 6 | 46 | 14.6 mm | 46 mm | 3.5 |
| 7 | 47 | 14.9 mm | 47 mm | 4 |
| 8 | 48 | 15.3 mm | 48 mm | 4.5 |
| 9 | 49 | 15.6 mm | 49 mm | 5 |
| 10 | 50 | 15.9 mm | 50 mm | 5.5 |
| 11 | 51 | 16.2 mm | 51 mm | 6 |
| 12 | 52 | 16.6 mm | 52 mm | 6 |
| 13 | 53 | 16.9 mm | 53 mm | 6.5 |
| 14 | 54 | 17.2 mm | 54 mm | 7 |
| 15 | 55 | 17.5 mm | 55 mm | 7 |
| 16 | 56 | 17.8 mm | 56 mm | 7.5 |
| 17 | 57 | 18.1 mm | 57 mm | 8 |
| 18 | 58 | 18.5 mm | 58 mm | 8.5 |
| 19 | 59 | 18.8 mm | 59 mm | 9 |
| 20 | 60 | 19.1 mm | 60 mm | 9 |
| 21 | 61 | 19.4 mm | 61 mm | 9.5 |
| 22 | 62 | 19.7 mm | 62 mm | 10 |
| 23 | 63 | 20.1 mm | 63 mm | 10.5 |
| 24 | 64 | 20.4 mm | 64 mm | 11 |
| 25 | 65 | 20.7 mm | 65 mm | 11 |
| 26 | 66 | 21.0 mm | 66 mm | 11.5 |
| 27 | 67 | 21.3 mm | 67 mm | 12 |
| 28 | 68 | 21.6 mm | 68 mm | 12.5 |
| 29 | 69 | 22.0 mm | 69 mm | 13 |
| 30 | 70 | 22.3 mm | 70 mm | 13 |
| 31 | 71 | 22.6 mm | 71 mm | 13.5 |
| 32 | 72 | 22.8 mm | 72 mm | 14 |
| 33 | 73 | 23.2 mm | 73 mm | 14 |
| 34 | 74 | 23.5 mm | 74 mm | 14.5 |
| 35 | 75 | 23.8 mm | 75 mm | 15 |
| 36 | 76 | 24.2 mm | 76 mm | 15 |
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