From Ann Tylor Celebrations, this beautiful cool blue silk duponi dress is beautiful for a bridesmaid or wedding guest. Size 18 measures 21 inches pit to pit and 36 inches from the top of the zipper to the bottom hem. Fully lined with supportive internal construction to keep the top in place all night. Includes detachable straps still in packaging. Roughly knee length or slightly below knee depending on height of wearer.