Derek Lam silk ruffle hem navy blue black dress

Peekaboo back cutout, zipper and button back, decorative buttons on shoulder, short sleeve / three-quarter length sleeve, fully lined, 2 ply crepe fabric. 100% silk. Pit to pit: 24” Waist: 13” (Very small waist) Hip: 17 1/2” Length: 42” Sleeve: 12” Size 4 Missing size label. Can also fit a size 6. But you have to have a small waist. Color is dark blue almost black