Measurements
We've designed our maternity clothes in line with your pre-pregnancy clothing size for extra ease, giving you one less thing to think about. Many pieces are infused with our signature ruching and wrapping, making them totally adaptable for a flawless fit at every stage.
Expecting Twins?
If you are pregnant with twins, we recommend you go up a size.
If you need further help with sizing, our friendly Customer Service team would be delighted to help.
Isabella Oliver | Bust | Chest | Waist | Top Hip | Low Hip | Arm | ||||||||
IO Size | US Size | cm | in | cm | in | cm | in | cm | in | cm | in | cm | in | |
0 | 0-2 | XS | 81 | 32 | 78 | 30¾ | 65 | 25½ | 77 | 30¼ | 92 | 36¼ | 54.4 | 21½ |
1 | 4 | S | 83.5 | 33 | 80.5 | 31¾ | 67.5 | 26½ | 79.5 | 31¼ | 94.5 | 37¼ | 54.7 | 21½ |
2 | 6 | 86 | 34 | 83 | 32¾ | 70 | 27½ | 82 | 32¼ | 97 | 38¼ | 55 | 21½ | |
3 | 8 | M | 91 | 35¾ | 88 | 34½ | 75 | 29½ | 87 | 34¼ | 102 | 40¼ | 55.6 | 21¾ |
4 | 10 | 96 | 37¾ | 93 | 36½ | 80 | 31½ | 92 | 36¼ | 107 | 42 | 56.2 | 22 | |
5 | 12-14 | L | 101 | 39¾ | 98 | 38½ | 85 | 33½ | 97 | 38¼ | 112 | 44 | 56.8 | 22½ |
6 | 16 | XL | 108 | 42½ | 105 | 41½ | 92 | 36¼ | 104 | 41 | 119 | 47 | 57.4 | 22½ |
International Sizing
Isabella Oliver Size |
0 | 1 | 2 | 3 | 4 | 5 | 6 |
UK size | 4-6 | 8 | 10 | 12 | 14 | 16-18 | 20 |
US/CA size | 0-2 | 4 | 6 | 8 | 10 | 12-14 | 16 |
EU size | 32-34 | 36 | 38 | 40 | 42 | 44-46 | 48 |
AU/NZ size | 4-6 | 8 | 10 | 12 | 14 | 16-18 | 20 |