I used to buy my work suits at Le Chateau which is a Canadian store, and they vanity size pretty badly (I'm 5'7" and 130 pounds, I fix an XS or size 2-4). Their online store does ship to the US, but returns are a bitch. Another Canadian store I used to shop at is Laura, though they're for an older demographic (40's+). Their garments are well-made and more true-to-size than other stores. Not sure if they ship to the US though, you'd have to have a look at their website.