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| Aretto Size | UK Size | EU Size | US Size | cm |
|---|---|---|---|---|
| S0 | 2.5 - 3 | 18 - 19 | 3.5C - 4C | 10.7 - 12.1 |
| S1 | 4 - 5.5 | 20 - 22 | 5C - 6.5C | 12.1 - 14.0 |
| S2 | 6 - 7.5 | 23 - 25 | 7C - 8.5C | 14.0 - 16.0 |
| S3 | 8.5 - 10 | 26 - 28 | 9.5C - 11C | 16.0 - 18.0 |
| S4 | 11 - 12.5 | 29 - 31 | 12C - 13.5C | 18.0 - 19.9 |
| S5 | 13 - 2 | 32 - 34 | 1Y - 3Y | 19.9 - 21.9 |
