I am a bigger woman, I purchased this because my husband liked how it looked.  The boning is very weak and it bends, it is not rigid and offers no support at all.  This WILL NOT cinch your waist, not even a couple inches.
The sizing is off, as the sizing directions said to order your band size, or if you wear a DDD+ to order one band size higher.  I wear a 46DDD and ordered a 46.  The cups were much too big, I would have to have another cup size to fill them.  the waist fit alright, but pretty much closed completely.  I could have ordered a 44 or even 42 and it probably would have been a better fit.

This is gorgeous, but the fit was just not right and it's definitely a lingerie only item, don't expect it to offer any shaping at all.