I created this badge holder as a replacement since my original holder broke.
I printed the model you can see in the pictures on a Prusa MK3S+ in PLA without any issues.
However I noticed that the cards fit slightly better if the holder is printed in PETG, since the cantilevers are not as rigid as in the PLA version.
I noticed that most cards fit nicely and tightly. However, if you are not so confident when it comes to the tolerances of you cards (or your printer), you might want to scale it up to something like 102%.
No need for support.
If you have questions, remarks, suggestions, I would be happy to hear from you.
The author marked this model as their own original creation.