Details Sergio Rossi's sophisticated croc-embossed boots will give your weekday outfits a luxurious lift. Small to size . See Size & Fit tab . Sergio Rossi knee boots: brown and gray croc-embossed leather, heel measures approximately 125mm/ 5 inches with a 10mm/ 0.5 inch concealed platform, round toe. Silver designer-stamped zip fastening at side.