I can't figure out what I love most about these truly divine J.Renee heels ... is it the shimmering swirly cut-outs that decorate the upper? Or the lovely black satin? Or the 8.5cm heel? Or the back zip for easy fitting? It's truly a gorgeous shoe! All man-made materials have been used. SIZING TIP: J.Renee is an average width and runs true to size.