Brinley Co Women's Trina Riding Boot Regular & Wide Calf Synthetic Imported Synthetic sole Shaft measures approximately 18" from arch Boot opening measures approximately 16" around This style is available in regular and wide calf sizes. Circumference: 15 inches, Wide calf: 17 inches Heel height/type: 1.37-inch block Style: Riding boot Upper/outsole material: Faux Leather upper/ TPR outsole