Four Basic Guidelines for Switching from Del Harris
Switch with teammates of equal or near-equal size on screens and crosses.
Switch to keep big players inside and small players outside on screens.Do this on changes and crosses away from the ball when possible, and on matching up in transition defense, as well as in recovering on rotations. Any communication that can allow a switch to accommodate the big in-little out concept is usually worthwhile.
Switch within fifteen feet of the goal.
Use the “emergency switch rule.” That is, switch whenever a situation arises in which a switch will challenge an open shot, regardless of the mismatch as X2 does for X5 in D-60.