Vintage Eve Stillman Half Slip Med? Large? Black Swishy Taffeta Embroidery Lace

Listed is a vintage Eve Stillman Original half slip, black, swishy taffeta style fabric with lace and embroidered applique detail at bottom. Pillow tab. Fabric: Unknown, swishy like a taffeta Size: Appears to be a medium or large. Please see all measurements. Condition: Gently preowned vintage condition. Elastic is a little weak but has fair to good stretch and return to shape, please see all photos. Inner size and fabric contents tag is missing. Lying flat, waist across unstretched measures: 13" Stretched: 19" From waist to bottom of slip: 22" including lace Thank you for looking!