Is it possible to get a custom width? Or do you suggest a way to cut it at home?

We recommend that you make the adjustment at home. If we cut it on our end, and you decide for any reason you would want to return the film, we would not be able to accept it back. These films are very easy to trim with the knife provided or a pair of scissors. There is a liner on the back so you can even make size marks to follow when you cut. The liner will then be removed.