The beading on this vintage dress is so beautiful! There are no tags, but the fabric has quite a bit of stretch to it , so it is probably polyester. There are snaps at the shoulder suggesting it had a slip at one time. I do not have the slip. My best guess for a size is small to medium. The hankerchief hem has panels that open up to the dropped waist. Approximate measurements have been unstretched, laying flat. It is in EUC Armpit to Armpit 17 inches Length at longest point of hem 52 inches