Naturalizer Women's Etton Knee-High Boot 85% leather/15% elastic Imported Synthetic sole Shaft measures approximately 16" from arch Heel measures approximately 2.5" Boot opening measures approximately 14.5" around Leather upper Cushioning insole features N5 Comfort System Non-slip outsole B3364L22, B3364L11, B3364L2201, B3364L2200