Shoe-In Spiked shoes currently come in 3 sizes at this time to fit all your spiked shoes needs for applying epoxy and decorative coatings. These shoes sizes are based on the US Men’s size foot chart. Shoe-In Spikes sizes are based on work boot sizes. If you are wearing an athletic shoe for your installations you may need to adjust your sizings accordingly as they tend to be smaller and less bulky. MEDIUM FITS (SIZE 9 & UNDER) LARGE FITS (SIZE 9 – 11) XTRA LARGE FITS (SIZE 11 – 16)