Size & Fit - Fits TRUE TO SIZE based on 48 customer reviews 10mm/1/4" heel. Meet the Quinn Mary Jane flat. - We gave our iconic square-toe style an update in the form of a stylish (and secure) Mary Jane strap. With polished leather, a softly squared toe and a flexible glove-like fit, this pair is proof that the classics can evolve (and become even comfier). 95% leather/4% nylon/1% spandex. Rubber/plastic outsole. Imported. Select stores. Item CM883.