Vintage Black Nylon Tricot Slip by Hollywood Vassarette Munsingwear
Black slip has a firm feel to it, not as supple as some nylon. Makes a rustling noise.
Size 34 A, check measurements: Measures 16. 5" across at bust. So 33" around with room in the cups.
28" waist. 35" hips. 37" long. Adjustable strap. Mannequin is 5'8" XS 32/25/34
No flaws.

This item is sold from an excellent, highly rated vintage boutique.