NWOT BCBG silk butterfly dress

Where to start with this showstopper? With the butterfly top and open back, it cascades down into a full skirt. It’s 100% silk with a polyester lining (from the skirt down). I suggest tying a knot where the 3rd pic depicts once you figure out where you want it to sit so it doesn’t slide around. Never worn which is a shame! 43” length (but variable depending on the top), 12.5” waist