Easy maternity size guide
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 for a flawless fit at every stage.
- Refer to the chart below. It's really that easy.
- Take your pre-pregnancy clothing size, and look across the chart to find your Isabella Oliver size.
If you are in doubt please check against our measurement chart to find your correct size against your body measurement.
Isabella Oliver Clothes Sizing Guide
| Isabella Oliver Maternity size | 0 | 1 | 2 | 3 | 4 | 5 | 6 |
| UK Pre-pregnancy size | 4-6 | 8 | 10 | 12 | 14 | 16-18 | 20 |
| US Pre-pregnancy size | 0-2 | 4 | 6 | 8 | 10 | 12-14 | 16 |
| EU (FR) Pre-pregnancy size | 32-34 | 36 | 38 | 40 | 42 | 44-46 | 48 |
| AU/NZ Pre-pregnancy size | 6-8 | 10 | 12 | 14 | 16 | 18-20 | 22 |
| Isabella Oliver Maternity Size | Small | Medium | Large | X Large | ||||
| UK Pre-pregnancy size | 8 | 10 | 12 | 14 | 16-18 | 20 | ||
| US Pre-pregnancy size | 4 | 6 | 8 | 10 | 12-14 | 16 | ||
| EU/FR Pre-pregnancy size | 36 | 38 | 40 | 42 | 44-46 | 48 | ||
| AU/NZ Pre-pregnancy size | 10 | 12 | 14 | 16 | 18-20 | 22 | ||
Isabella Oliver Maternity 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 | 83 | 33 | 78 | 31 | 65 | 25½ | 77 | 30½ | 92 | 36¼ | 54.4 | 21½ |
| 1 | 85.5 | 34 | 80.5 | 31½ | 67.5 | 26½ | 79.5 | 31¼ | 94.5 | 37¼ | 54.7 | 22¾ |
| 2 | 88 | 34½ | 83 | 33 | 70 | 27½ | 82 | 31¼ | 97 | 38¼ | 55 | 21½ |
| 3 | 93 | 36½ | 88 | 34½ | 75 | 29½ | 87 | 34¼ | 102 | 40¼ | 55.6 | 21¾ |
| 4 | 98 | 38½ | 93 | 36½ | 80 | 31½ | 92 | 36¼ | 107 | 42 | 56.2 | 22 |
| 5 | 105 | 41 | 100 | 39½ | 87 | 34¼ | 99 | 99 | 114 | 45 | 56.8 | 22¼ |
| 6 | 112 | 44 | 107 | 42 | 94 | 37 | 106 | 42 | 121 | 48 | 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 |
| UK Pre-pregnancy size | 8 | 10 | 12 | 14 | 16-18 | 20 |
| Isabella Oliver Maternity Jeans 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 12 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 0844 844 0448 or email TheGirls@IsabellaOliver.com, and we'll be delighted to help you.
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SLEEVE
Measure from the armhole seam at shoulder point to the hem of the cuff.
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WAIST
This is the slimmest part of your natural waistline. Above the naval and below the ribcage.
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INSIDE LEG
The measurement betwen the top of your leg (crotch) to the ankle.
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LENGTH
These are taken from the highest part of the garment, either the shoulder seam or the centre back neckline to the hem.
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BUST
Measure around the fullest part of your bust.
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TOP HIP
Stand with your legs together and Measure around your top hip which should be approximately 10cm below your natural waist.
LOW HIP
Stand with your legs together and measure around the fullest part of your hips at the top of your legs. be approximately 23cm below your natural waist.
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. To find your size for the ultimate comfort click here.
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).
