Satin finish pvc panels with shiney pvc at the seams and stays with shiney straps across the front into big chrome buckles.  Lined in cotton.  Laces in the back.  Seriously evil, but in the best possible way.  This is a medium weight lingerie level corset and not meant for fetich level cinching, but normal every day sucking it in and shoving them up.  Sizing is by waist and is as follows:   Small is 24 inches completely closed.  Medium is 26 inches completely closed, Large is 28 inches completely closed.  You never want to have it completely closed, so what you do is add about half an inch onto the size for a slow give of the fabric once it's exposed to your body heat.  then you want to order 1-3 inches below your natural waist size.  The bustline will take care of itself.  Just remember to lift them up as you tighten in back for the proper support and for maximum effect.  So for instance, if you are a 30 inch waist, you would want a Medium.  Because these have 2 sets of laces, one for the bottom and one for the top, it's very easy to get a custom fit if you want more cinching at the bust and less at the waist, or the opposite if you desire.