Peony Brand Shanghai China Vintage Kimono Dress Rayon Medium?

Very good condition 100% rayon Color = Turquoise The size tag is not present, but based on measurements (below), I'm estimating a size medium. Side zipper Snaps that run from the zipper up to the high neck Side slits on both sides Armpit to armpit: 18.75" Length: 52" Waist lying flat: 16"