VTG 1970s Bohemian Hippie Festival Maxi Dress

Love this dress...very typical of that era!! It's in a pretty wine color with an all over floral print in pink,turquoise & tan...features an empire waist with attached belt to tie around the back square neckline flutter Capelet sleeves and back nylon zipper..it's by Shawn Originals,size says D but I don't know how that translates to a number size my best guess would be a 5/6 maybe 7/8...it's in a poly cotton blend PROB, in EUC! Measurements: L:59", B:34, SH:12", SL:11", W:15" empire, Hips:25"