How Should Shoes Fit You. The finger test can tell you whether you have enough wiggle room. As we mentioned, most shoes should be between 0.5 to 0.65 inches longer than your feet, but runners may want to err more toward 0.65 inches of additional space.
It states that there should be at least about ⅜ to ½ inch gap between the big front toe and the end of the shoe. Running socks when you are buying shoes try them on in the evening (when your foot is slightly bigger) and try them on with running socks. Then take them home and spend some time.
They cannot be too loose either.
Originally, people thought “how can i buy a shoe that i’ve never tried on that actually fits properly?”. Always fit a shoe to your larger foot. Put on the sprint spikes and check their length. Shop for shoes at the end of the day when your feet have already expanded.
