Vintage 50s-60s black nylon full slip with lovely ruched chiffon ribbon highlighting the yoke and bottom edge of skirt. The label was removed but it certainly is commercially made and the fabric is a very soft and supple nylon or nylon blend.
Condition is EX with no flaws of note and although I have not cleaned it, it remains very clean and fresh straight from long term closet storage.
A larger size with outside dimensions while lying flat of: 42-Bust. 36-Waist, 42-Hips, 56-Sweep and 43 inches overall length from top of shoulder to bottom of hem.