Brinley Co. Womens Regular and Wide-Calf Knee-High Side-Zipper Buckle Riding Boot Faux leather Imported Synthetic sole Shaft measures approximately 16" from arch Platform measures approximately 0.5 This style is available in REGULAR CALF-B(M) US and WIDE CALF-C/D US. Circumference: 15 inches, Wide calf: 17 inches Heel height/type: 1.5-inch block Style: Riding boot Upper/outsole material: Faux leather/ TPR