Madewell The Greta Ballet Flat in True Black Size 9. New without box however may have slight wrinkling/misshaping from storage and handling. See photos. The best-selling leather ballet flats have a perfectly squared-off toe, an elastic Mary Jane strap and dozens of five-star reviews. Plus, our MWL Cloudlift Lite padding makes it feel like you're walking on a...well, you know. Upper: 100% leather. Lining: 100% leather. Sole: man-made rubber.