Sizes 10-18 available. Was £18. Picked this up from my local Argos last night - I am just over 6 feet tall so bought it fully expecting it not to be long enough (though the pictures suggest it's quite long in the leg). It fits!
Love the geometric design and you get a cute belt too (elasticated at the waist). Well worth a fiver!
Composition: 100% Viscose.
Machine washable at 40C.
Keep away from fire.
Edit: Also, this review may be of interest to some new mums:
"This outfit was recommended on a breastfeeding clothing group on social media. It has a button on the front which makes it perfect for access! It is true to size and looks good dressed up as well as being worn casually. I was also amazed by the excellent quality considering the budget price. I highly recommend this outfit, especially to fellow breastfeeding mums."