Vintage JC Penney? Two Piece Pink Maxi Nightgown and Robe Set

Vintage two piece maxi nightgown and robe set. Light pink. Robe has white floral bib with ruffles and bow detail. Robe has puff sleeves and buttons down the front. Nightgown has double spaghetti straps and elastic underbust with bow detail. Both are 100% nylon. Brand tag has been cut but looks like it could have been JC Penney. Great vintage condition. Bit of the bows are safety pinned on. Marked size 13. Best for a S-M. Measurements are approximate and taken while laying flat. Gown Armpit to armpit: 16” Underbust: 11.5” stretches up to 21” Armpit to bottom hem: 46.5” Robe Armpit to armpit: 19.5” Shoulder to bottom hem: 54”