From Naturalizer, the Kalina Stretch Knee High Boots features: Leather/neoprene upper closed round toe Side zip closure and back pull tab recycled lining Contour + Comfort technology for a premium fit and all-day comfort experience Approx. 3.25" block heel height  Approx. 14.37" boot height Approx. 14.17" standard shaft circumference Approx. 16.14" wide shaft circumference Imported. Styling Notes: Measurements based on size 6 boot. For each half size larger, shaft increases by 0.12 inches, circumference by 0.20 inches Consciously packaged: our shoe boxes are made of recycled paper + soy-based ink Insole, toe box and heel counter crafted from partially recycled materials