Vintage 1960s Shift Dress

Excellent condition. Zipper back, hook&eye closure at neck. Lightweight fabric — not sure of content but most likely polyester but a silky feel vs. heavy feel. No brand, fabric or size tags. Measurements (taken flat): shoulder-to-shoulder: 15”, pit-to-pit: 20.5”, waist: 18”, hip: 21”, sleeve length: 10”, length: 40.