Size M. Good quality for the price range. But huge at the cups, my boobs don't even begin to fill these cups. I added TWO sets of stick on boobs and it still didn't help. I'm 5'6" 118 lbs and wear a 36A. The waist was fine so I may just cut out the cups and use it as an under breast corset.

Got a Large cause I heard they ran small. I am usually a medium in American sizes. Even ordering a size up, I had to widen the back almost as far as it would go, & my waist is borderline between 29/30 inches.
Having said that, I absolutely love this waist trimmer! It's my first "corset" of any kind, and I chose this one as a starter just to see if I liked it. I do! It gives a nice slim fit without cutting off my air, and I had much more mobility than I thought I was going to! It's fairly well-made for the price, and the side zipper meant I could get it on & off by myself. Only thing is I wish the shoulder straps were adjustable, because I have small shoulders & they kept slipping a bit. The cup size is also a bit big for me (I'm a C-cup, & I have a feeling that having to order the large for the waist size means they assume you have bigger boobs too?) I will probably have to add a small gather to rein in both the straps and the cups a bit, but no biggie.
As for the "corset" part, I've been keeping the ties loose for now, but will probably go tighter over time. I wore it twice for ~20min at home just to get used to the feeling, and finally went out for a night with it on last week. I had no problems and didn't feel constricted, and I had it on for 6-7 hrs (and felt sexy the whole time!)

I followed the advice of another reviewer, so I will stress this to everyone else as well. I bought this product to incorporate into a halloween costume. I am going to be the white swan from Swan Lake ballet. I did as another reviewer suggested. If you will measure yourself accurately as instructed in the sizing chart, then this product will fit you just perfectly. I was a little scared about ordering a 2x considering I am 5'10"-5'11", 155lbs and very fit. I normally wear a size small or medium in most clothing items. I just measured myself generously and followed the size chart. It fits perfectly and it is not too tight. The only thing is that it is kind of big for my boobs, but that can be easily fixed with silicone padding.

As for the quality of this item, I was very happy with it. It does not look or feel cheaply made. It looks really pretty and it will be perfect for my halloween costume.

I will stress this one more time: Follow the size chart and you will be fine. Be sure to measure yourself accurately and do not guess. If I had guessed, I would have ordered a large or extra large and it wouldn't have fit. Follow the size chart, measure accurately and generously and you will be fine. I would say if you're falling inbetween a size, probably go with the bigger size.

My daughter goes to many costume events and I bought this for her. She has a lovely hourglass shape and the fit was perfect. She especially liked the fact that once it has been laced in the back for a perfect fit, the corset can be taken on and off with the side zipper, so no need for tedious re-lacing. This would be a knockout for a formal event paired with a maxi skirt, or worn over a chemise for a Renaissance Fair or Pirate Festival. The Steel Blue Damask fabric is lovely and the dark boning is slimming. It will fit perfectly because you can lace it to fit each curve. My daughter's figure is 41/31/43 and she is 5'4". We bought x-large in spiral steel blue and love it!

I have wanted to try a corset for so long. This one for my first one is amazing. You can easily put it on by yourself and take it off. It's so comfortable to wear for hours. Will be ordering more.