Zimmermann sensory velvet Cream Floral slip Dress size 1 (could fit 2) wedding

Zimmermann cream ivory velvet sensory floral embellished slip dress. Back zipper. Size 1 but is roomy on top so could fit a bigger but or someone who wears a size 2 in Zimmerman. I’m a size 4 and it is too big on me. In perfect like new condition. No marks, stains or signs of wear. Top part is lined and structured, bottom is flowy velvet.