CLARKS Women's Un.Rita Ankle Boot 100% Leather Rubber sole Shaft measures approximately 6" from arch Heel measures approximately 1 1/4" Platform measures approximately 1/2" Boot opening measures approximately 11" around Lambskin lining with reduced stitching prevents irritation and blisters Unique air circulation system with intake vents allows cooler, fresh air to enter Channeled mesh allows warm, moist air to escape through exhaust vents Lightweight ''Ultra Flex'' EVA outsole reduces lift load and foot fatigue