Nine West Women's Isuza Knee-High Boot 100% Synthetic Synthetic sole Shaft measures approximately 17.75" from arch Heel measures approximately 2.5" Boot opening measures approximately 16.5" around The style name is Izusa. The style number is IZUSA-BLK. Brand Color: Black (Main Color: Black) Material: Synthetic Measurements: Shaft measures 16.25", Circumference measures 16" and 3" heel Width: B(M)