The Maternity Tank


Size guide

In stock

Meet the people that make this for you.

Fits true to size, we suggest ordering your normal size.

Whether it's for warm days, or to layer under jumpers and jackets, this maternity tank is a true wardrobe hero. We've designed it with a built in shelf bra for comfort and extra support. Designed in a slim fit and with stretchy ruching detail to ensure it fits beautifully throughout your pregnancy.

  • You can wear this during pregnancy and beyond
  • Crafted in soft premium jersey
  • Hidden internal shelf bra for comfort and support
  • Subtle side ruching to ensure a flattering fit

Meet the people that make this for you. Watch the video.

    • 90% Viscose, 10% Elastane
    • Machine Wash - 30°
    • Product Code: TP020
    • Back shoulder at neck to hem - 79cm (31"). Ruched - 61cm (24")
    • For more sizing information please click the 'Sizing' link under the size selection box
Delivery & Returns



      • Standard Shipping 5-7 business days - FREE* for US orders over $99 (normally $9.95)
      • We've covered all applicable duties in the selling price when you make a purchase.
      • International Shipping to over 120 countries available


To find out more about all shipping information and timescales, click here.


Naturally we hope you’ll LOVE your purchase, but it’s alright to change your mind. We offer full returns on all unworn items returned with tags.

View the complete Returns Policy here.

Reviews Average Rating 142 Reviews on
11th April 2019

Well made and designed Tank

31st March 2019

Great for every outfit

14th March 2019

Great top, lovely quality. Great for layering

16th August 2018

Really comfortable - good to wear on its own or underneath a dress

2nd August 2018

This tank was a little big for me but that was not a impediment for use. Has an inner elastic very useful. Nice design.

19th July 2018

True to size. Quality excellent.

12th July 2018

Great quality and fit. Not too short in the body.

27th June 2018

Fantastic quality, space for the bump to grow and washes brilliantly.

22nd June 2018

I wore this style of tank all the way through pregnancy, breastfeeding and beyond, and here I am buying another one even though I'm neither pregnant or nursing! I love this style.

9th June 2018

Lovely fit, quality fabric

9th May 2018

This tank is very flattering and great for summer. It can also be dressed up or down. I now have it in multiple colors.

8th May 2018

Love it! I typically wear a size 12/14 U.S. I went with the Size 5 per the sizing chart and while it is a little big, I still have three months to go so I am confident it will last from day one of showing through to month 9. It's long, too, which is greatly appreciated.

6th May 2018

This top is incredibly comfortable and really well made - for the price I couldn't believe the quality - amazing!

5th May 2018

Great quality, with great stretch and support. A must have staple in your maternity wardrobe.

23rd January 2018

Beautiful dusky pink colour and fantastic fabric. However the elastic under bust was extremely tight - ordered a 8 and have 30” bust but was still uncomfortably tight. Had to return this one.

28th November 2017

Amazing top, very flattering cut and although I hear the other reviewers on the built-in shelf bra bit I find it suits me and helps me feel supported. Absolutely love the material and style, will buy other colours!

12th October 2017

The material of this shirt is beautiful and super soft. The only problem is the built-in bra. If you are carrying high like me, I found it tight and super uncomfortable. I'm 31 weeks and was hoping this would work out. Please make this top without a built-in bra. I don't even see why it is necessary.

4th October 2017

Too fitted, wrong style for me & the pink was a little more dusky than expected which didn't really suit me so I have returned it. Good quality material though & would have been better if patterned

8th September 2017

Great fit and material. Would love in more colours

8th September 2017

Beautiful top, perfect fit

28th August 2017

I really need a white tank but this one easy just too sheer it had to go back

11th August 2017

Nice material and fit! Would buy again!

17th July 2017

Great top - either casual or dress up. In fact as I am writing this review - I am wearing this very same top! I have one in white too - I liked the while top so much - I bought a black one too! The fit of the top - I've put 4 stars - only reason being is that the straps are just a tiny bit on the big size - they could be more snug is what I am saying but I am keeping it!

16th July 2017

Best maternity tank top!

3rd July 2017

Really pleased with my top! I am a size 8/10 - purchased a size 2 - this does fit me - however just a little tiny bit long in the arm straps - just a little though! I am definitely keeping this top - great to wear casual or dressed up.

18th June 2017

So comfortable and supportive.

18th June 2017

Great for layering!

18th June 2017

Wear these tanks everywhere.

10th June 2017

Nice thick material, good length and fits bump nicely! The elasticated under boob bit is irritating after a few hours!

10th June 2017

Good length, covers the bump nicely! Material nice and thick! Has gone slightly bobbly after just a few washes which is a shame, as they weren't cheap!

2nd June 2017

Great quality and I love the fit. This is a comfortable and flattering style.

10th May 2017

Gorgeous fabric...perfect thickness to not show anything through the white unlike most other tank tops.Great length and fit...have now ordered in other colours as this will definitely be a wardrobe staple!

18th April 2017

Great for summer

17th April 2017

Love the tanktops

26th March 2017

Great quality of material

20th March 2017

Great for casual or smart. I know some people complained about wider straps being too wide. I personally want to make sure my bra strap is covered and I am comfortable. Will be a great all round top and lovely colour true to photo.

9th March 2017

Snug fit but lovely - straps wide enough to cover bra straps too.

22nd February 2017

Stylish tank top, easy to wear which shows off bump perfectly.

17th November 2016

Bought this to wear as an everyday top or to yoga. Stretches nicely over the bump to provide a flattering look.

14th November 2016

My favorite tank . Purchased this w/all 3 of my pregnancies . Only wish is that it came in more dark colors

4th August 2016

Wear to work and casual events. Very versitle

23rd June 2016

Super comfy top and I can mix and match with skirts etc. A great staple for the maternity wardrobe.

22nd June 2016

I love these tanks! I bought one in each color. I am typically a size 6 and bought a 2. I am 5'10 and a 34D (for reference) and the length is perfect. The cut and side ruching of these tanks make them super flattering. My only complaint is the elastic within the bra area underneath. It is very tight and uncomfortable. I do not feel like it is supportive enough to wear without a bra, so the combination of my bra and the elastic is really uncomfortable. I took these tanks to my tailor who took the elastic out and attached the bra portion to the rest of the shirt. That is so much better, but the reason I deducted a star. I wish there wasn't a bra band to begin with. You may be able to avoid this by ordering up a size.

14th June 2016

The perfect everyday top for hot summer days! Great fabric, very stretchy.

3rd June 2016

Fab fit and great seasonal colour.

3rd June 2016

One of my pregnancy must haves. I cannot seem to stop wearing it even after pregnancy as the high quality jersey doesn't bag or bobble and stays looking gorgeous.

25th May 2016

I have many maternity tank tops and this is the first one that really covers my bump. I went down a size (from 2 to 1) as I hope to keep wearing post-pregnancy.

24th May 2016

A bit tight under the bust for me but otherwise perfect.

21st May 2016

Lovely colour

18th May 2016

Good layering item. Neckline quite low.

14th May 2016

Great, basic staple to add to my growing maternity wardrobe. I only gave it four stars because after a little while the elastic bra starts to dig into the skin, but yet it's not too tight for the most part. I wear this under tunics, button down tops and zip up sweatshirts.

11th May 2016

A bit too tight, the inner bra was too long and the armcycle to high. Returned it.

10th May 2016

Very nice fit, lovely feel to fabric. I bought for general wear and for holiday

8th April 2016

The only reason its not a 5 is because the description didn't make it clear that there was a built-in shelf bra, and if I had of known I would have got a different size. I bought the same top in a different colour a couple of months ago and that had no bra so it was a bit unexpected. Other than that, great little top, looks nice with skinny jeans.

7th April 2016

returned this item as I am still nursing my toddler and shelf bra too cumbersome. Otherwise a great looking tank.

5th April 2016

Very versatile top which fits really well and looks great - I love the colour.

5th April 2016

Very versatile top which fits really well and looks great.

29th March 2016

Good quality although I haven't worn it yet - waiting for the sunshine. Seems a good fit for my 17 week bump (2nd baby so quite big for 17 weeks) with room to grow. Flattering neckline

28th March 2016

Perfect tank! Comfortable and flattering fit!

24th March 2016

Great buy

17th March 2016

I had two of these when I was pregnant and wore them most days. Just ordered a replacement to wear while not pregnant.

14th March 2016

Though I haven't actually worn this item yet, it is of high quality and will be great for the summer or even under a shirt or jacket.

12th March 2016

Sadly i had to return this item because the material was too thin, making the shirt see-through. There's a small lining that covers just the front of the bra area, which makes the thin material even more noticeable.

8th March 2016

The tummy part should be double layered as it is too transparent to be worn on its own.

5th March 2016

This is a saturday casusal staple!

3rd March 2016

This tank is very versatile, can be worn with a pair of ripped jeans and flats or with heels and a statement necklace for a night out!!

3rd March 2016

Great fit and fabric. Washes very well too. This is a piece I see myself wearing even after not being pregnant. The sizing is very accurate. I am a size 4 pre-pregnancy, ordered a size 1 and it fits great.

22nd February 2016

Great for maternity and post maternity. Flattering fit and length. Goes well with any bottom.

21st February 2016

Perfect for layering.

20th February 2016

I hope to wear it casually once the weather warms up

12th February 2016

Can't wait to wear this in Summer, such good quality I can dress up or down.

11th February 2016

Perfect for summer. Great weight and cut.

9th February 2016

Lovely material, and great length. I've work it to work with a blazer and on the weekend with jeans

8th February 2016

I haven't worn this out yet, but I tried it on and it's wonderful. I love, love the feel... the material is substantial but not weighty.

6th February 2016

Good quality! A good colour!

5th February 2016

Great staple during pregnancy.

25th January 2016

Nice piece

21st January 2016

Great staple maternity top- I have purchased in every colour. Even better at sale price. Fit bump so well and make you feel fab.

21st January 2016

Excellent wearable piece

20th January 2016

Versatile. Will wear loads!

18th January 2016

Nice basic tank.

14th January 2016

Good qulaity, good basic top

14th January 2016

Good quality, good basic top

13th January 2016

I returned as slightly too pricey for a white vest.

24th November 2015

Perfect for layering to extend the life of non maternity tops with a new bump with plenty of room for growth! Great quality, flattering fit.

22nd September 2015

Has proved incredibly useful. Now a maternity wardrobe staple.

22nd September 2015

Love the side rushing - makes for a very flattering fit

1st September 2015

perfect everyday staple!

27th August 2015

An absolute staple in my wardrobe, I have ordered several and am living in them at the moment. Very comfortable and an excellent fit

27th August 2015

Love the tank. The only thing is, they should really make it more obvious that there's a tight supportive "built-in bra" in the tank. It's kind of annoying with a good underwire bra on, and then the top half essentially has two layers of material, making the bottom half a little see-through!

27th August 2015

Nice style and quality

9th August 2015

An absolute must! Works with dress pants, jeans, shorts, anything really. Buying in more colors, worth the price.

9th August 2015

A great top you can grow into and for all occasions

4th August 2015

Tank is nice and thick, so bras will not show through.

27th July 2015

Wear it casually and under a smart blazer for work. I've bought 3 of these now and literally live in them at the moment! Great for layering as well as on their own. They feel quite supportive to, which is great when you aren't feeling as toned as normal around the hips and back.

23rd July 2015

Great quality tank! I'm sure it will remain a staple in my closet post-pregnancy as well!

20th July 2015


20th July 2015

The built in bra was not mentioned in the description for this top and the band is a little tight. Other than that, the top is great quality and the fabric is very comfortable. After ordering one size, which is my usual size, I had to return for one size up for it to fit comfortably. I feel like *** sizing is a bit smaller than I'm used to.

18th July 2015

These are fabulous and look great with jeans . The built in support is a nice feature and the ruching hides extra lumps very well !

14th July 2015

some concerns about its transparency

14th July 2015

very good, looking forward to wearing

13th July 2015

Great everyday top

13th July 2015

Love this - can we get in navy or other darker-ish colors (maybe some heathers) besides black?!

10th July 2015

great quality. Everyday Summer essential.

1st July 2015

This tank can be dressed up or dressed down for versatility. I like wearing it with white crop pants and a fedora for a beachy feel. It looks and feels great. The built-in bra support is a little on the snug side for me, but my torso is so short, I can't really go up a size without it being too big all over.

29th June 2015

Shelf bra lining was way too snug. With the white I think it would be better to have the double layer all the way down. It was very obvious where the lining stopped; it looked funny with an open cardigan. Returned for these two reasons.

29th June 2015

Tank is great, but the shelf bra lining is very snug. I had hoped to layer tanks but couldn't because of how tight it was.

18th May 2015

A great staple piece. Works at any stage of the pregnancy.

15th May 2015

great quality material and great fit - also good length

14th May 2015

Stylish top I will wear after pregnancy also

13th May 2015

Love the way the top falls over the belly!

6th May 2015

Really practical and flattering tank top - I combine it with a skirt for work and jeans on the weekend. As with all Isabella Oliver products, the fabric is of a high quality and the ruching emphasises my bump in a really flattering way.The band of the inbuilt support is a bit firmer than I am used to, but it is still comfortable.

1st May 2015

I have two of these now and are nice to wear without a bra now I'm larger. Being white I prefer to wear it under something rather than on its own.

19th April 2015

Love this, also the top is lined, which is nice makes the look more seamless. True to size on this piece. I got this in two colors, its a great piece and can be worn with a lot of things. Great quality, fabric is soft.

14th April 2015

Key piece

6th April 2015

Hidden support is a bit to tight.

31st March 2015

Everyday use, but will be using for more smart occasions.Recommend to all.

19th March 2015

Another pregnancy staple, I've worn this piece winter into spring! Comfy and durable, this tank is a must. Prepragnancy size S (4) the small fit perfect!

19th March 2015

Same as the grey, one of my favorite staples!

11th February 2015

Must own for every expecting mom! Very versatile!

9th February 2015

Comfy and stylish. Wish they were cheaper so I could buy more! Would love more colours

4th February 2015

This is a great top to layer. I purchased this because I'm due in the summer and know I'll mostly need clothing for warm weather. I've already worn this to work with an open cardigan and know that as it gets warmer I can wear it with lighter layers or alone on the weekends!!

20th January 2015

Runs small compared to other tops I ordered that were same size. Excellent quality, though.

25th November 2014

Great for layering or wearing on its own. The description does not mention it, but there is a built in bra. Do not size up, stick with your pre-pregnancy size.

30th October 2014

This is a great basic layer that will take you all the way through your pregnancy. Love the weight of the material, not too thin.

13th May 2014

Lovely item but not greatest quality

13th May 2014

Lovely item but not greatest quality

19th December 2013

A little restrictive around the bust. A great basic top. Washes well

19th December 2013

A little restrictive around the bust. A great basic top. Washes well.

Brilliant top
20th August 2013

I purchased this in the turquiose and it hasn't disappointed. It's a gorgeous colour and makes you feel happy! The fabric is lovely and soft, cool and comfortable. The ruching is great to cover my 34 week pregnant bump and bottom. I still use a bra as the inner support doesn't feel as safe with my E cup chest. I brought a size 3 to feel comfortable but this is just personal choice as i'm usually a 2. Washed it only a handful of times and so far so good, due to comments below about bobbling I chose a lesser spin cycle (non creasing) and this seems to be working. I really wish i'd discovered IO in my first pregnancy and earlier on in this one as the clothes are beautiful and no other store/designer can compare!

A little disappointing to be honest.
8th July 2013

The fabric is thick enough (I bought white) to wear with over bump maternity jeans. The built in bra is very tight fitting - I am usually a 0 but wish I had bought a size 1. Lovely fit elsewhere and didn't need ironing after 30* machine wash. I am not happy that it has already started to bobble after 4 wears and 3 washes. I would have expected it to last me longer.

fab top
18th June 2013

top looks great and very high quality. its thin enough to be comfortable but thick enough to look substantial and cover up a popped belly button! color is beautiful and so vibrant. the built in bra is a little tight but maybe thats just me.

Good basic
15th June 2013

This is a good basic but I would of preferred the inside double layer to be full length. Particularly for the white vest. This is what I would of expected for the price.

Fabulous top
4th May 2013

I love this top, great colour, lovely fit and makes me feel really stylish in spite of the expanding bump! The secret support is a little tight but that's ok.

28th April 2013

Comfortable and a good fit. The turquoise was just a bit too bright for me, so it went back, but I swapped a black and a white one ;o)

17th April 2013

Absolutely LOVE this top! I purchased the White and Blue and might buy the other 2 colors. Perfect for everyday use. So comfy but yet stylish. I am normally a size 4 and I ordered the Size 1 IO and it fits perfect! These tops need to be in every pregnant woman's wardrobe!

Great top, but go up a size!
7th April 2013

I'm 5'5" and wear a 0 in IO, 105lbs pre pregnancy weight. Everything else fits perfectly in a size 0, but this shirt is super tight - especially in the bust. I'd recommend going up a size.

Great Transitional Piece
20th March 2013

this tank is wonderful - i have the blue melange and white. I do wish the straps were a bit shorter, as they fall off the shoulder once in a while.

Great Staple
1st February 2013

Normally an Aussie size 12, I bought this top in size 3. Although a little big, I've still got 20 pregnant weeks to go. Very very happy, what a great staple. The inner support is great too. Glad I got the size 3 for this reason, I think the 2 would have fit beautifully, but the support would have been too restrictive. Again, IO has provided me with smart maternity clothes!

29th January 2013

Great Top!
29th October 2012

I usually wear an Australian size 12 - 14 so decided to order the size 4 in IO. However when I received the top it really didn't flatter my curves. So I returned it in exchange for the size 3 and I love it! It shows just the right amount of cleavage, it flatters my curves and the cut is super stylish. Looks great with a pair of jeans and flats for a casual look or under a nice jacket paired with jeans and heels for a night out. I would highly recommend this top as a pregnancy staple.

Thumbs down. on cut
16th October 2012

I love my cap sleeve tshirt. I could live in them and honestly for the last several weeks I have! I have three of them and absolutely love them. I expected the tank to be cut somewhat similar to the t-shirt. It is NOT. Not even a little bit. Inside the tank is a lining with elastic which is the destroyer of what is thisclose to being a perfect essential item, but instead ends up on ebay. That elastic 'inner bra' is not a bra. It will provide you with zero support, but on top of that, the elastic on this inner bra is insanely low. I know while pregnant our breasts get bigger. Trust me, I do! I am now wearing a G cup! G!!!! So I do get it, but the elastic on the inner bra is closer to my belly button than under my breasts. Way too long! But it is also oddly tight and as my body changes shape throughout the day I get incredibly uncomfortable. The straps are also not the same distance as the t-shirt in going over the shoulder. So I am constantly finding my bra poking out at the top which NEVER happens with the t-shirt. This tank is also freakishly long and I have a long waist! I can overlook this freakishly long length, but the inner bra just makes this tank a massive disappointment. I would not recommend buying it. Just stick with the t-shirts. They are amazing and worth every penny.

Read more reviews