I'm not an expert on UK sizing, but PetiteLittleGirl bravely ventured out and tried their regular sz 6 in this post. The dresses were a bit big on her, but I have a feeling that their petite sz 4 will fit much smaller. I have had several readers suggest this size to me saying that it is tiny! Size chart says that it is equivalent to Euro 32, which at H&M fits like a US sz 00.
I'm passing on this sale, but here are my picks, all $30 or less and all still left in Petite sz 4:
1. Petite Floral Dipped Hem Dress, $30.44
I think the deeper V neck adds a sultry twist (and chance to show off a good push-up!) and the fluttery hem is very feminine.
2. Petite Floral Tea Dress, $25.36 - another floral pick, with an edgy exposed zipper in the back.
3. Petite Pleat Detail Shift Dress, $30.44 - I am drawn to this shift dress in bright coral. I think it would also look nice with a skinny waist belt.
* PS - For those who don't live near a Theory outlet, I found out that they ship to you for a flat rate of $15. I picked up the Caprine Jacket in a creamy white (see it on AN here) in sz 00 for $75:
For those who are interested, I included the tag for easier locating. See store listing here.