Choose a dress with a lined bodice (to avoid sheerness) and a hemline that hits at or just below the knee for the most universally flattering look
In flats, it is floor length
In a 1923 feature on French actress and fashion darling Regina Camier, Vogue cites how Aided and abetted by LanvinCamier made many converts to the Robe de Style. Top Designers of the Era Gabrielle Chanel, Elsa Schiaparelli, Jeanne Lanvin, Callot Soeurs, Jean Patou, Madeleine Vionnet, Madame Chruit, Paul Poiret, Norman Hartnell, Sonia Delaunay, Jane Regny, Jeanne Paquin, and Premet
My friends wore Belly Bandit (not sure which one), but in all the research I did, this one seemed to be best for what I needed extra support, a bit more back coverage (I am fleshy back there), and the compression I needed in the waist to move everything back to where it was