To ensure a great fit we've designed our maternity clothes in line with your pre-pregnancy/normal clothing size. All pieces are designed with ruching or wrapping to grow with your changing shape to fit all the way through. So, for example, if you were a US 8 before you were pregnant simply order Isabella Oliver Size 3, or your relevant size in the easy size guide below.
ISABELLA CLOTHES SIZE GUIDE
| if you're US/CANADA Size | if you're UK Size | if you're EUROPE Size | Order ISABELLA OLIVER Size |
| 0 | 4 | 32 | 0 |
| 2-4 | 6-8 | 34-36 | 1 |
| 6 | 10 | 38 | 2 |
| 8 | 12 | 40 | 3 |
| 10-12 | 14 | 42 | 4 |
| 14-16 | 16-18 | 44-46 | 5 |
| 18 | 20 | 48 | 6 |
ISABELLA OLIVER JEANS SIZE GUIDE
| if you're US/CANADA Size | if you're UK Size | if you're EUROPE Size | Order ISABELLA OLIVER Size |
| 0 | 4 | 32 | 0 |
| 2-4 | 6-8 | 34-36 | 1 |
| 6 | 10 | 38 | 2 |
| 8-10 | 12 | 40 | 3 |
| 12 | 14 | 42 | 4 |
| 14 | 16 | 44 | 5 |
| 16 | 18 | 46 | 6 |