From Naturalizer, the Kalina Leather Knee High Boots features: Leather upper Inside zipper closure Recycled lining Contour + Comfort technology for a premium fit and all-day comfort experience Synthetic outsole Approx. 13" Narrow boot shaft height Approx. 14.5" Standard boot shaft circumference Approx. 16.5" Wide boot shaft circumference  Approx. 18.5" Extra wide boot shaft circumference Approx. 3.25" block heel height  Imported. Styling Notes: Consciously packaged: our shoe boxes are made of recycled paper + soy-based ink