Alexander Wang dress with sleeves

Beautiful white Alexander Wang sample dress (New York, ~ 2011). Never worn out of the house. In amazing condition and wonderful quality--very soft material. The neck has a zipper detail (see picture) so you can zip up the neckline to make it higher. It's a gorgeous dress, but I'm selling because I don't have enough occasions to wear it. There is no size listed on the dress, but since it is a sample and based on how it fits me, I believe it's around a size 2. I am 5'4" and it hits a bit above the knee on me (see pictures).