A simpler cards / badges holder with the option to attach a small ring to it.

You can store 5 cards in it.
It's easy to slide out the top cards by applying some pressure with the thumb.

• Badge_Holder_hang.stl is the version you can attach to a small keyring

• Badge_Holder_simple.stl is a simple version without any attachment

No

Yes

0.2 or 0.3 is ok

doesn't matter

PETG is more flexible and durable