View larger 
The Katy Perry Hollow heel slingback in Softy Mirror is fashioned with a square toe and an artfully sculpted heel for trend-savvy appeal.
| US | UK | EU | JP |
|---|---|---|---|
| 5 | 3.5 | 35 | 21.5 |
| 5.5 | 4 | 35.5 | 22.0 |
| 6 | 4.5 | 36 | 22.5 |
| 6.5 | 5 | 37 | 23.0 |
| 7 | 5.5 | 37.5 | 23.5 |
| 7.5 | 6 | 38 | 24.0 |
| 8 | 6.5 | 38.5 | 24.5 |
| 8.5 | 7 | 39 | 25.0 |
| 9 | 7.5 | 40 | 25.5 |
| 9.5 | 8 | 41 | 26.0 |
| 10 | 8.5 | 42.5 | 26.5 |
| 10.5 | 9 | 43 | 27.0 |
| 11 | 9.5 | 44.5 | 27.5 |
| 11.5 | 10 | 45 | 28.0 |
| 12 | 10.5 | 46.5 | 28.5 |
| 12.5 | 11 | 47 | 29.0 |
| 13 | 11.5 | 48 | 29.5 |
| US Size | EU Size | Age | In |
| 4M | 3.4 | 3.4 | 3.4 |
| 4.5M | 34.5 | 3.4 | 3.4 |
| 5M | 35M | 3.4 | 3.4 |
| 5.5M | 35.5M | 3.4 | 3.4 |
| 6M | 36 | 3.4 | 3.4 |
| 6.5M | 36.5 | 36 | 3.4 |
| 7M | 37 | 36 | 3.4 |
| 7.5M | 37.5 | 36 | 3.4 |
| 8M | 38 | 36 | 3.4 |
| 8.5M | 38.5 | 36 | 3.4 |
| 9M | 39 | 36 | 3.4 |
| 9.5M | 39.5 | 36 | 3.4 |
| 10M | 40 | 36 | 3.4 |
| 10.5M | 40.5 | 36 | 3.4 |
| 11M | 41 | 36 | 3.4 |
The Katy Perry Hollow heel slingback in Softy Mirror is fashioned with a square toe and an artfully sculpted heel for trend-savvy appeal.
