Our sizing is as easy as 1, 2, 3...
We've designed our maternity clothes in line with you 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 for a flawless fit at every stage.
Refer to the below chart. It's really that easy.
Take your pre - pregnancy clothing size, and look across the chart to find your Isabella Oliver size.
So, if you were usually a US 8 before you were pregnant, just order and Isabella Oliver size 3, or if you are a US 10, the our size 4 is for you.
If you are in doubt please check against our measurement chart to find your correct size against your body measurements.
Isabella Oliver Clothes Sizing Guide
| Isabella Oliver Maternity | 0 | 1 | 2 | 3 | 4 | 5 | 6 |
| UK size | 4-6 | 8 | 10 | 12 | 14 | 16-18 | 20 |
| US size | 0-2 | 4 | 6 | 8 | 10 | 12-14 | 16 |
| EU/FR size | 32-34 | 36 | 38 | 40 | 42 | 44-46 | 48 |
| AU/NZ size | 6-8 | 10 | 12 | 14 | 16 | 18-20 | 22 |
| Isabella Oliver Maternity | X-Small | Small | Medium | Large | X Large | ||||
| UK size | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | |
| US size | 2 | 4 | 6 | 8 | 10 | 12 | 14 | 16 | |
| EU/FR size | 34 | 36 | 38 | 40 | 42 | 44 | 46 | 48 | |
| AU/NZ size | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 22 | |
Baukjen Measurement Guide
| Isabella Oliver Pre Pregnancy | Bust | Chest | Waist | Top Hip | Low Hip | Arm | ||||||
| cm | in | cm | in | cm | in | cm | in | cm | in | cm | in | |
| 0 | 81 | 32 | 78 | 30¾ | 65 | 25½ | 77 | 30¼ | 92 | 36¼ | 54.4 | 21½ |
| 1 | 83.5 | 33 | 80.5 | 31¾ | 67.5 | 26½ | 79.5 | 31¼ | 94.5 | 37¼ | 54.7 | 21½ |
| 2 | 86 | 34 | 83 | 32¾ | 70 | 27½ | 82 | 32¼ | 97 | 38¼ | 55 | 21½ |
| 3 | 91 | 35¾ | 88 | 34½ | 75 | 29½ | 87 | 34¼ | 102 | 40¼ | 55.6 | 21¾ |
| 4 | 96 | 37¾ | 93 | 36½ | 80 | 31½ | 92 | 36¼ | 107 | 42 | 56.2 | 22 |
| 5 | 101 | 39¾ | 98 | 38½ | 85 | 33½ | 97 | 38¼ | 112 | 44 | 56.8 | 22½ |
| 6 | 108 | 42½ | 105 | 41½ | 92 | 36¼ | 104 | 41 | 119 | 47 | 57.4 | 22½ |
*All measurements are based on our standard size 2/UK size 10, 173cm/5' 8" model.
Isabella Oliver Trouser Lengths
| Isabella Oliver | cm | in |
| Regular | 81 | 32 |
| Long | 86 | 34 |
Isabella Oliver Jeans Sizing Guide
| Isabella Oliver Maternity sizing | 1 | 2 | 3 | 4 | 5 | 6 |
| US Pre-pregnancy size | 4 | 6 | 8 | 10 | 12-14 | 16 |
| Isabella Oliver Maternity sizing | 25 | 27 | 29 | 31 | 33 | 35 |
Expecting Twins?
If you are pregnant with twins, we recommend you go up a size. So, if you were a size 8 before you were pregnant, order an Isabella Oliver size 4.
Clothing measurements in centimeters and inches can be found on our individual product pages. If you require a little more information, just call 1 800 662 0594 or email TheGirls@IsabellaOliver.com, and we'll be delighted to help you.
Measuring your bra size
A well-fitting bra is a wardrobe necessity, whether you are pregnant or are nursing. Follow our simple guide to find your perfect fit. Click here
Hosiery
sizing
Isabella Oliver Luxe Opaque Tights are essential for your maternity wardrobe during the colder months.
| Height | To fit skirt / Hip Size | |||
| UK/EUR | 8-10,(36-38),88-92cm,(34.5-36ins) | 12-14,(40-42),96-101cm,(38-40ins) | 16-18,(44-46),106-111cm,(42-44ins) | 20-22,(48-50),117-123cm,(46-48ins) |
| 150-160cm,(4ft 11ins - 5ft 3ins) | S | M | L | L |
| 163-170cm,(5ft 4ins - 5ft 7ins) | M | M | L | - |
| 173-178cm,(5ft 8ins - 5ft 10ins) | M | L | L | - |
| 178-183cm,(5ft 10ins - 6ft) | L | L | - | - |
Cake Lingerie Sizing
| Small | Medium | Large | |
| UK size | 10 | 12 | 14 |
| US size | 4 | 6 | 8 |
| EU/FR size | 36 | 38 | 40 |
| AU/NZ Size | 10 | 12 | 14 |
Nearly Nude Sizing
| S/M | M/L | |
| UK | 8-12 | 14-18 |
| US | 4-8 | 10-14 |
| EU | 36-40 | 42-46 |
Spanx Sizing
Use the below size chart for the Mama Spanx range. Use your pre-pregnancy weight to work out your size (click on the picture to enlarge).
Shoes
| UK | 3 | 4 | 5 | 6 | 7 | 8 |
| US | 5 | 6 | 7 | 8 | 9 | 10 |
| EU | 36 | 37 | 38 | 39 | 40 | 41 |