There are some initial steps that once completed, will provide you with a customized fit without any of the guesswork typically found with other athletic equipment. Most of the one size models on our buying guide simply require the user to install the laces, slip their feet in, and clip off the excess amount with a pair of scissors. This ensures a good fit that will keep your shoes securely in place without the risk of excess lace snagging on something or coming undone as you run your race.