The BERKLEIGH BLACK WIDE CALF square toe knee boot gives you a sleek and defined silhouette with a stretch fabric construction and platform sole with a block heel . Square toe platform block heel knee boot Side zipper closure Extended shaft circumference for wider fit 3.25 inch heel height 1 inch platform Size 6 measurements: 13.46 inch top-shaft circumference, 13.1 inch mid-shaft circumference , 15 inch shaft height Size 8 measurements: 14.33 inch top-shaft circumference, 13.5 inch mid-shaft circumference , 16 inch shaft height Size 10 measurements: 15.20 inch top-shaft circumference, 13.9 inch mid-shaft circumference , 16.5 inch shaft height For correct calf measurements, measure your bare calf at its widest circumference with your foot flat on the ground Features stretch material for a flexible fit — may allow for additional calf circumference beyond listed measurements Vegan leather upper material Textile lining Vegan leather sock Synthetic sole Imported