I usually wear either a 2 or 4, and this dress in XS fits perfectly. It hugs my stomach a little, but the hanging tie distracts from that. My husband says I look really slim in it. The polyester fabric is soft and comfortable, and it is wrinkle free.
Bought this in a medium - I'm a 36C and this fit beautifully. Nice drape to the front which hides a thicker tummy. Great length. Soft fabric. The fabric is thin - might want a good slip underneath. Very pleased - a nice dress for work, church, dinner out.