Very easy to install. It seems like they really have a small, medium and large indicator that they go by when filling the order. Note, that this headset does not support the Dolby Atmos app/support that you can purchase on the XBOX store. Nothing special but a good value for the price. Attach your drilled brackets to the shoe rack and rest the (empty) rack on the moulding. My current set is getting worn out, so was time to get some new ones. what I don?t love is for some reason they mess up my ONE ear. They may not be a snug fit, but they might work for you, too. Unfortunately it wasnt meant to be. not practical if you ned both hands to get your passport out!