Derek Lam White Dress Size X-Small but fits XS, small and medium because there is a stretch. Details: New With Tags from Barney’s New York. The color is called optic white, it’s like an ivory. Perforated design with frayed edges. Beautiful thick fabric, very well-made, can be worn for so many occasions. 36” in length. I can provide more measurements. Fabric: 83% viscose 17% polyester Lining: 82% cotton 18% polyamide All orders ship same or next day.