Vintage 1960s little black dress

This is a cute polyester “Madmen” style little black dress with a neat ruffle and bow at the neck. Metal zipper up the back!
Approximate modern size 8 but pay attention to measurements:
Measured flat:
39″ long
18″ bust (36″ around)
17″ waist (34″)
19″ hips (38″)
Lined to bottom 12 inches – noticed on measuring that left and right armpits were previously mended – otherwise in great condition and you can’t tell. ILGWU label.