I wore this very costume to a Halloween party last night. It fits pretty well for a one-size-fits-all garment. I am 5'4" with an average build and my dress size is 6, and it was a fairly flattering fit. The model has had the corset taken in a little bit for a good photograph; the corset does lace up, but only on the front. If it was a truly adjustable corset that wrapped around the torso and laced up front to back, the costume would have been considerably more expensive than it was. I had to pull it down every once and a while so the slack would not bunch up. I paired it with simple black leather boots and some jewelry and had a blast.
For the price point, this is a pretty good costume that did not require a lot of fuss to make it look presentable. I felt comfortable and looked put-together without showing a lot of skin or covering up too much and ending up hot and stuffy. When I purchased it at a store, there were some stray threads that needed to be cut. The quality is not perfect but, again, I can't complain much for the price. I enjoyed it enough to want to spend more on the next costume I buy, if that is any indication!