A half-zipper closure gives the HOLLY BLACK WIDE CALF knee boot a calf-defining fit while an angled block heel and a square-toe giving this style a sharp finish. Square-toe block heel knee boot Side half zipper closure Angled block heel 2.75 inch heel height  Size 6 measurements: 13.19 inch shaft circumference, 14.25 inch shaft height Size 8 measurements: 13.98 inch shaft circumference, 15.5 inch shaft height Size 10 measruements: 14.76 inch shaft circumference, 16 inch shaft height 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  Fit tip: If you are in between sizes, size down a half-size Imported