Brinley Co Womens Studded Trim Slouchy Mid-calf Boots Synthetic Shaft measures approximately 14 from arch Boot opening measures approximately 16 around Heel height measures approximately 0.25 inches. Taken from a size 6. Shaft height measures approximately 14 inches. Circumference measures approximately 16 inches. These boots are completed with man-made lining and rubber soles. Microsuede upper/man-made outsole