Vintage Yellow Slip Dress

Such a gorgeous dress! I purchased this dress at a vintage boutique in Vancouver, BC. It's midi length, with a flattering hem, and a cowl neckline. It has an open back where the straps tie up allowing them to be adjustable. Unfortunately, I don't know the materials because there aren't any tags but I would assume it's silk because it's vintage. I'm a size 2/4 and it fits me loose. My sister is a 4/6 and it fit her body too. I would say it's a size 4 but looks flattering on 2-6.