Knee high boot with Naturalizer infinity ornamentation and side zip closure Synthetic upper with closed round toe and 3 1/4 inch block heel Contour+ Comfort technology for a premium fit and all-day comfort experience 15.16 inch boot height; 14.57 inch calf circumference Note: Measurements based on size 6 boot. For each half size larger, shaft height increases by .12 inches, circumference by .20 inches. If smaller than size 6, subtract accordingly. Consciously packaged: 100% of our shoe boxes are made of 80% recycled paper + soy-based ink