Anthropologie black/multicolor maxi dress size M/S

Maxi dress purchased at Anthropologie I think in 2012. Size tag says M but it fits more like a S/size 6. Length was perfect for me to wear with some heel or even flats and I'm 5'8". Skirt part is black and flowy shiffon like material with two layers. Top has a mesh-like skin toned under layer with the knit on top. Not really see through so can be worn with any colored bra. Top part falls at natural waist, waistline has stretch so no zippers anywhere. Lay flat measurements from shoulder to waist 18", waist is 12" and streches to 18". Has only been worn a couple of times, dried cleaned and stored in a garment bag.