VTG Oscar De La Renta Satin Ivory Cream Colored Long Flowy Nightgown

VTG Oscar De La Renta Ivory Cream Colored Long Flowy Nightgown Polyester Satin Material Tag only reads "petite" but is a generous cut, I'd guess will small to medium but please see sizing for bust and length Flat lay size in inches: 20" pit to pit 53" length Good vintage condition. Buttons all intact. I found two very slight stains on very bottom, near side seam (see last two photos)