It gives a circle skirt just enough shape to create a nice fit-and-flare look, that would otherwise just hang down limply. The fit was as expected, and the amount of "poof" this petticoat gives a dress is ideal-- it makes it flare without too much volume. I would buy two if you want a 1950's-look skirt to have a *lot* of volume--those vintage style dresses with circle skirts can handle it, and wearing two will give you that "starchy", authentic crinoline look from that era.