One 3-tier layer of crinoline - This slip is equal in fullness to the UC6070, but has an addition of a single ruffle on the cover skirt at the bottom for added flair to the gown's hem. This slip has a zipper in the back which holds it in place.  For sizing please refer to our "Sizing chart" located at the bottom of the homepage. For questions please call our toll free number: 1-888-622-6997.