My order for the size small just arrived and its the most flattering dress I own. I have a previous review below where I bought a size medium and it was too big. For reference I am 163cm tall and my measurements are, Bust: 91cm (I wear a 12B in bras) (35.8inches), waist 75.5cm (29.7 inches), hips 92cm (36.2 inches). My waist and hips fit a size small perfectly. The chest area is a little bit tight because I have a wide back (but still flat chested), and it feels a bit tight when I inhale but it's not uncomfortable. I think if your chest was any wider than mine the small would probably be too small.
Rated 4 out of 5
Rated 5 out of 5
Rated 1 on a scale of minus 2 to 2, where minus 2 is Runs Small, 0 is True to Size and 2 is Runs Large