Steve Madden Astor Moto Boots. The Astor square toe boot features a slouchy mid-calf silhouette reinforced with strap accents and substantial buckle hardware. A wide sole with a block heel provides a solid foundation for this engineer-inspired design. Square toe block heel boot. Slip-on style. Heel harness strap with hardware. Top gore with 2 buckle straps for adjustable fit. 2 inch heel height. Leather upper material, lining and sock. Synthetic sole. 14" shaft circumference, 12" shaft height (size 8). Imported.