This dress reminds me of Easter with all of it's pretty colors. Vintage 70s, possibly 60s, dress or house coat by Keyloun for Neiman Marcus. There are no size or material labels, but it feels like polyester. It has a Talon half zipper. Pit to pit measures about 18" and it measures about 23" across the waist. The length is about 50". I'd recommend for a small as the bust area and sleeves are pretty little. One of the sleeves will need a minor repair as the stitching has come undone. Please see all photos.