This is a size 4, Spaghetti Strap Stretch Crepe Midi Dress (DB STUDIO, DS270110) in the color Quartz. The dress is beautiful and has a body-hugging silhouette, a classic-cool straight neckline, and adjustable spaghetti straps. It's made of polyester and spandex, so even though it is form-fitting you can still move comfortably. It is also fully lined.
I only wore this dress once as a maid of honor, and it was comfortable enough to wear all day at an outdoor summer wedding. It is in excellent condition. It is not altered, and it has been dry cleaned.