Nanette Lepore maxi dress with leather trim, size 2

Good used condition. Sleeveless full length maxi dress. True to size. Fully lined with hidden side zipper. Made of 100% lightweight polyester with real leather trim. Care tag recommends dry cleaning but I have hand washed, and it came out fine. Wish it fit me, but it is a little too snug. I need a size 4. pit to pit is 16” across. Underbust measures 13” across. Shoulder to hem is approximately 56”.