From Naturalizer, the Fannie Knee High Leather Boots feature: Leather upper responsibly sourced from Leather Working Group certified tanneries and recycled lining Naturaliazer 'N' infinity ornamentation Insole, toe box and heel counter crafted from partially recycled materials Side zip closure + hidden gore for extra flexibility REZORB™ responsive cushioning for shock absorption + impact protection for sneaker-level comfort Contour+ Comfort technology for a premium fit and all-day comfort experience Approx. 14.96" boot shaft height Approx. 14.33" calf circumference Approx. 2.625" block heel Note: Measurements based on size 6 boot. For each half size larger, shaft height increases by .12 inches, circumference by .20 inches Imported.