Rare Vintage sequined top SAGAIE Size 3 or XXS

This is a Vintage top circa 90’s from a french designer “Sagaie” it is made in France. Gorgeous piece, like new!!!! Would fit an XXS I’m 34B would enter in it, but pretty tight. It would fit a petite chested women. Did the calculation equals a bra size of 28B Top flat lay is 15” has a slight stretch to but not much!