This was purchased to wear under a 50's style dress.  It fit about as expected.  The top part is quite stretchy and definitely longer than I expected so this WILL NOT work for a really short dress.  The dress I wore it with was about to my knees (I'm 5'10) and I had to pull the petticoat up to just under my breasts so it wasn't peeking out the bottom.  I've seen a lot of dresses that would be really cute with it showing but the one I wore was not one of those.  It definitely added a little lift to the skirt without it being too poofy.  If you are looking for extra poof, I'd recommend adding another petticoat.
Another recommendation...fluff the skirt after opening.  It's pretty flat when you first get it so a simple fluff will help.  I even turned it upside down to fluff a little more.  worth the price if you are looking for a little umph under a dress or skirt.