Joules Women's Kelly Welly Gloss Rain Boot Rubber Imported Rubber sole Shaft measures approximately 10" from arch Heel measures approximately 1" Boot opening measures approximately 14.5" around Glossy rubber rain boot with easy-on tab at back and adjustable strap at side A white wax film may appear on the surface of the rubber boot and 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.