Vintage 70’s Diane Von Furstenberg dress

DVF dress with no fabric or size tag Thrifted item needs dry cleaning since I don’t know fabric content Good condition One belt loop needs mending shown in pics No belt Elastic waist Deodorant marks in pits may come out with cleaning Bust, arm and length measurement in pics I am 5’4 and it fits me like a midi dress Suspect this would fit a size 6-8 or a medium Ruffles on wrists and neckline Black with blue and pink ribbon design