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Una Summer Maternity Dress


Size guide

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This fluid lightweight dress is the epitome of easy summer style. Wear this piece loose with ankle boots, stacked jewellery and a hat for a cool twist on summer chic. Give this easy summer dress a tough edge and layer with your favourite leather jacket and a colour pop clutch.
  • Catalogue code: DR166
  • 100% Viscose
  • Machine Wash
Size & Fit
  • Length from back shoulder to hem line - 97cm (38")
  • Need Help with Sizing? -To keep things simple we've designed our maternity clothes in line with your pre-pregnancy clothing size. For more size information click the sizing link above, or if you need further assistance please contact our Customer Service Team who will be delighted to help
Delivery & Returns



      • Standard Delivery (2-3 working days) FREE 
      • Next Weekday Delivery (order before 4pm) FREE* for orders over £149 (normally £6.95)
      • Collect in Store Next Weekday (order before 3pm) - FREE* for orders over £129 (normally £4.95)

      • Pre-9am Next Day Delivery (order before 4pm Friday) - £19.95

      • Saturday Delivery (order before 4pm Friday) - £9.95

      • Sunday Delivery (order before 4pm Friday) - £9.95

      • Day of Choice – from £6.95

      • International Delivery to over 120 countries available

Find out more about all delivery options and timescales.


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

View the complete Returns Policy here.

Reviews Average Rating 9 Reviews on
16th May 2014

Wore to lunch. Nice b/c it can be dressed up or down.

13th May 2014

I wear it to work and pair a tan cardigan over it but will wear it without the card in the summer.

Great dress
4th September 2013

I bought the dress in white. It was a great buy, I just had to shorten it so it fit me better. Everyone complimented me while wearing at a pool party.

9th August 2013

Good if discounted.
8th August 2013

Bought this during a flash sale. The Khaki colour is actually a much brighter green than expected so would do for spring, summer or early autumn. The fabric at first glance was disappointingly thin & creased very easily but when on it was surprisingly comfortable & flattering. The buttons make breast feeding possible too which is a huge bonus so I kept it. I wouldn't pay full price for this but good if you want a dress to carry you through to post pregnancy & you don't mind ironing!

Love this dress
8th August 2013

Much nicer in real life than the photo. A deeper peachy colour than pictured. Quality material but creases quite easily. I bought this as a casual summer dress, the style is very flattering over my mummy tummy and top unbuttons easily for nursing. Gorgeous! I bought this in a size 3 as I'm between a uk size 10 and 12 it fits my fuller bust comfortably and there would be plenty of room for a growing bump.

great summerdress
8th August 2013

I ordered it in one size bigger than i need, because of the other reviews, that said it could be too small around the breast if you would order your usual size. As I´m 26 weeks pregnant it fits perfekt, I ordered a size 3, although I usually wear size 2! great fit, great quality and comfort!

Nicer than the website
21st July 2013

This is the third dress I've bought from IO in the last two days and each and every one looks much better in reality than on the website. The colours are nicer than shown, The peach is a little more vibrant and doesn't wash me out like I thought it might. The material is lovely soft and silky - well worth the money.

Twill sundress
21st July 2013

I ordered this in two sizes as I didn't want it to be too tight across the chest but my regular size was fine. The material is twill-like and in the khaki colour way could easily be worn into Autumn with a jacket or cardigan.

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