Brinley Co. Womens Regular and Wide-Calf Knee-High Buckle Ankle-Strap Riding Boot PU Leather Imported Synthetic sole Shaft measures approximately 16 from arch Platform measures approximately 1.50" Style: Boots. This style is also available in Wide Calf. Circumference: 15 inches, Wide Calf Circumference: 17 inches Shaft height: 16 inches Heel height/type: 1.58-inch block Upper/outsole material: Polyurethane upper/ TPR outsole