Brinley Co Women's Vega Knee High Boot 100% Synthetic Imported Synthetic sole Shaft measures approximately 17.5" from arch Platform measures approximately .50" Boot opening measures approximately 15.5" around This style is available in regular and wide calf sizes. Circumference: 16 inches, Wide calf: 18 inches Heel height/type: 1-inch block Style: Riding boot Upper/outsole material: Faux leather/ TPR