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 engineer boot Slip-on style Heel harness strap with hardware Top gore with 2 buckle straps for adjustable fit 2 inch heel height  Size 6 measurements: 13.75 inch shaft circumference, 11.5 inch shaft height Size 8 measurements: 14 inch shaft circumference, 12 inch shaft height  Size 10 measurements: 15 inch shaft circumference, 13 inch shaft height Leather upper material with studs Leather lining  Leather sock  Synthetic sole Fit tip: if you are in between sizes, size up a half size Imported