Sfnld Women's Fall Spring Slouchy Chic Knee High Knight Boots Shaft measures approximately 17" from arch Flat, Antiskid and Durable Rubber Sole; PU Leather Upper Knee High and Round Toe Design Shaft Measures Approximately 17.0 Inches from Arch. Boots Opening Measures Approximately 14.6 Inches. Ankle Circumference Measures Approximately 11.8 Inches.