Homecoming or Prom dress

Silver homecoming/prom/wedding dress. Purchased from Macy's, only worn once. Material has somewhat give to it, so there is spandex is it. I can not find a size. But pics show bust at 14" across, lowest measured hips at 17.5" and length from very top of strap to bottom at 34". I believe I was a size 4-6 when I wore this. Any questions let me know. No flaws