It arrived today! Have been out tonight so got home to a lovely Matches box.
The dress is, unfortunately, going back. Is too big around the top, and the smaller size would be too small around the bottom. But it is a very, very nice dress - very eye catching, lovely heavy fabric, hangs well (not clingy around bum) and not too orange or spangly. Def needs heels, there's no way it would look good dressed down, flat shoes could tip it into frumpy beachwear on anyone over 25.
And it is short - OK if you have good knees, 2/3 of the way down my thigh, and I'm 5'6''. I think to do it justice you do need to be a bit curvier - I'm a size ten but pretty straight up and down.
I really liked it, worth a go. But I'm the wrong shape for it, as it's pretty unstructured. Go on cornsilk, give it a go...