New Vintage Blue with white embroidery dress. SZ ?

New without tags or markings. Blue cotton, sheath sundress with beautiful embroidered detail. Size is unknown. Approximate flat measurements: Bust 34”, Hips 36”, Length 41”, Shoulder width is 12” seam to seam. There is a small cap sleeve. No rips, stains or loose white threads. Very lightweight fabric. There is no lining. From a smoke free home. Thank ya for taking a glance!