Vintage drop waist sleeveless pink dress by Swee Lo.  Silk with acetate lining.  Back zipper.  Size large.  Please see the dress measurements in the photos and compare those to other garments you own to get an idea about sizing.  

There is tiny pinhead sized spot near the center of the neckline and a small bit of yellowing on the inside near the corner of  the brand label.  Please see photos.