AKT Shoes Spiked Slip-OnAusKut slip on spiked shoes fit directly over the shoe without requiring any additional srapping or fixtures. Large washers behind each spike significantly improve weight distribution to minimize damage to the shoe. Available in 3 sizes to fit over boots; if wearing athletic shoes, adjust accordingly as they are proportionally smaller for the same shoe size. MEDIUM (SIZE 89) LARGE (SIZE 1011) X LARGE (SIZE 1216)