T by Alexander Wang Ladies Flats. SKU: 30324F068-BLACK. Color: Black. T by Alexander Wang Billie Mary Jane Leather Flats. These Mary Jane flats feature a pebbled texture, a silver-tone logo-engraved buckle strap fastening, a square toe, leather lining, a branded footbed, and a leather sole. Outer: Leather 100%. Please visit the brand website for sizing information.