Anthropologie Ghospell Dress Size M NWT

Anthropologie Ghospell Dress Size M (Size 6). I have never worn this dress but it’s just a little small for me. So pretty though! The dress zips all the way for easy taking on and off and the sleeves have buttons if you want it tighter or you can leave them unbuttoned. It says Medium on the Dress but I bought as a Size 6! I would say it fits more like a small. THIS DRESS HAS NEVER BEEN WORN, the dress i’m wearing in the pictures is a different size, which I am also selling!!! (size 8!)