I bought the red ones and four pairs were enough to cover my two 360 controllers, my PS3 controller and my Wii U controller. They all fit perfectly and I feel that they greatly increase the lifespan of each joystick (I've also tried it on my steam controller joystick for science and it's handy and perfect too). It can be a little tricky to get them right and it may take a few tries. Flipping them, centering them perfectly on the joystick, and then deploying them on all sides at once is a quick and easy way to do this. They should never come off if you put them on properly, unless you take them off on purpose. Will definitely be buying more for the rest of my controllers
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