Vintage pleated blouse with silver/black button down the back and sleeves

Vintage pleated blouse with silver/black button down the back size M (approximately) verify measurements below! Blouse is in excellent condition! Unique piece with gorgeous material and detailing Brand unknown, no size tag. Measurements are APPROXIMATE and were taken laying flat Size: no tag fits like a Medium Length: 21.5” Waist: 42” Pit to pit: 21” Shoulder to shoulder: 15.5”