Don’t place them OVER the wrist joint: while you do not want the wrap to be too far onto the forearm (providing no support) and you do want to prevent excessive wrist extension, remember that in many movements you are wearing the wraps for, you need to actually extend the wrist. That is to say, if the wrap is covering the joint line, you might be causing dysfunctional movement to happen at the wrist when you go into wrist extension positions, say, as in a handstand. Be mindful of the movement you are going to perform and if you are in fact blocking that movement. Again, the wrist is designed to do this and if you block the motion at the wrist, you WILL get it somewhere else. Our bodies are good compensators and though this is a great feature of evolution, it can certainly lead to musculoskeletal injury.