Columbia Women's Sierra Summette IV Slip Winter Boot 100% Leather/Textile Imported Synthetic sole Shaft measures approximately 9" from arch Heel measures approximately 1" Platform measures approximately 0.75" Boot opening measures approximately 12" around Great, functional waterproof winter boot Waterproof suede and textile upper Warm and comfy faux fur collar 200g of insulation temp rated to -25 degrees Waterproof and seam sealed for protection from the elements