This is an Opti dress. It's black and size L, but it runs large. It's a pull-over style, with no zippers on the back or sides. The slip dress and the lace overlay are separate. It's a two-piece set. It's an easy-to-wear dress with a cool, refreshing feel. Flat Measurements: Length: 76cm (slip dress) Length: 75cm (overlay dress) Width: 38.5cm (slip dress) Width: 47.0cm (overlay dress) The slip dress has a flaw, as shown in photo 6, but it's not visible when worn under the dress. Please note that this is a used item stored at home, and it has been inspected by an amateur. Please refrain from purchasing if you are looking for perfection or are overly sensitive to imperfections. Please consider the above before purchasing. Item number: zeofv05