Sperry Top-Sider Womens Ambrose Leather^Suede Shaft measures approximately 5.25" from arch Boot opening measures approximately 12" around The Ambrose boot by Sperry Top-Sider&reg; is the perfect boot to get you through autumn and beyond with its stylish leather construction and reliably grippy outsole. Leather and suede upper. Buckle accent at shaft. Side zip for easy on and off. Soft man-made lining for a comfortable feel. Lightly cushioned footbed for all-day comfort. Nonmarking rubber outsole with Wave-Siping&trade; technology that delivers the ultimate traction on both wet and dry surfaces. Imported. Measurements: Heel Height: 3 in Weight: 1 lb Circumference: 12 in Shaft: 5 1&frasl;4 in Platform Height: 1&frasl;4 in Product measurements were taken using size 8, width M (B). Please note that measurements may vary by size.