I bought a thick (3mm) magnet band which can be easily cut using a scissor.
It is 30mm width so the RFID tags fits if the borders are cut (don’t cut the antenna!).
As the magnet band has an adhesive side, I put the RFID tag upside down and can put my printed paper directly on it without additional glue.
As mentioned, I’m using 3mm magnet band. But it might also work with thinner bands. Please leave a comment if thinner band is working for you.