I made this to put a 25mm diameter nfc tag on a keychain of mine, this is really simple an prints easily in PLA, you will need some adhesive to make the tag stay in place

I used the standard 0.12mm layer height high quality profile from bambu studio

Printed with Bambu Lab P1S with 0.4mm nozzle

There are two files one with a text and one without (in fact there are 4 files (2 SLDPRT & 2 STEP, one for each with and without text)