Joules Women's Wellibob Rain Boot 100% Rubber Imported Rubber sole Shaft measures approximately 4.5" from arch Heel measures approximately 0.75" Platform measures approximately 0.5" Boot opening measures approximately 11.5" around The boots might have white wax film may appear on the surface of the rubber boots and that it can be wiped off with a damp cloth. This "blooming" effect is not a defect. Blooming is caused when the boots are exposed to extreme temperatures or temperature swings and the wax helps prevent the rubber from weathering.