Vintage Christian Dior ivory cream silky satin lace midi slip dress Sz 36? *read

Beautiful Vintage Christian Dior ivory cream silky satin lace midi slip dress. No size, but pit to pit measures about 18”, so I’m predicting a size 36 or Medium-ish. Good condition overall for its age! There are some small pulls/imperfections on back bottom hem as shown. A few loose threads here or there. See photos for full condition and measurements. Thank you!