I'm not really sure if this is actually a full slip or a slip dress but I am leaning towards a full slip that came with a matching dress. It is either made of nylon or rayon. The straps look like gathered pieces of nylon stockings. It has a 14" side zipper. Here are the flat measurements: Armpit to armpit 32", Waist 32", Hips 34", Length from center V 32", non-adjustable straps 11". The black and red label is sewn into the right hand side seam. Excellent condition.