Size Runs Large. TRUE WIDE WIDTH: Designed for wide foot and extra wide calf. EXTRA WIDE CALF:We strongly suggest that you refer to the measurement table in second product image to find the best fit. HIGH-DENSITY MEMORY FOAM INSOLE: high-density memory foam.Surprisingly comfortable. LOW STACKED HEEL HIGH(3.15 inch): Stylish Low block heel adds some inches to your look allows you to walk more stable. ELASTIC BAND/SIZE ZIPPER: For easy on/off. Worn once! Purchased from Amazon