Barbizon aqua midi length batiste nightgown

Very good used condition, vintage. Shoulder seam on right shoulder is flawed as shown in photo (only flaw or wear noted). White lace detail on rounded neck with pastel floral embroidery. No size tag or fabric content tag but feels like a poly/cotton blend. Longer midi length. Measures 19.5" bust, 28" hip, 42" length. I would assume this is a size M based on measurements of other Barbizon gowns.