DOOM Keycard Mini

Smaller and has a window hole to slide out NFC card more easily, if needed.

Print two (2) of the "Mini Top", and one (1) of "Mini Mid," then glue and sandwich together.

I have printed these cards in both PLA and PETG, at 0.2mm with good results.
However, you may need to tinker with your settings to get the details to come out well.