Grey Black White Silk Sleeveless Midi Dress

I got this adorable 100% silk sleeveless midi dress at a vintage boutique for a film shoot. The dress wasn't worn for our project but because I bought from another shop, not sure how old it is or how often worn. It is in excellent condition. It's a very cute style with shirring around the high neckline, a waistband, and hits just below knee (5'2). Back zipper goes to top. The print is a classy/sophisticated grey/white/black large floral pattern (not obviously floral, more abstract) The tag says size 3 but it fits 6-8.