Vtg NWT Jennifer George 100% Cotton 1973 Button down Shirt Dress Tan from Bergdorf Goodman Sz 4- it was $285 in the 90s! It is meant to fit loosely.

Measurements laid flat:
Size Marked: 4
Chest: 22.5 "
Waist: 22 "
Length from Shoulder: 37 "
Sleeve Length: about 20" raglan
Condition: New