Wife's review: This is a very well made waist trainer and looks very good on if it fits.  My daughter already has one and so I ordered one as well but alas I had to return it.  It was way too small for me. The small which she has seems to be the same sizing as the medium which I ordered.  So Apparently I have not quite understood the sizing.  I hope to get some information from the seller as to what is the right size to order.  The first one we ordered has helped my daughter to slim her waist and she wears in for exercise and daily wear when she feels its needed.  The waist trimmer on the top is small and the on one the bottom is a size medium.  I will update after getting the right size; overall I think it is a good investment if you want to trim some inches from the waistline.