An easy to print ID Badge Holder with lanyard attachment.

It was designed parametrically in Onshape. (design link) If you have a different shaped badge (or wish to make this a landscape orientation), you can use that design to accommodate your needs.

This can be printed in just about any material. I have printed it cleanly in PLA, PETG, ABS, ASA, PC+CF, and a few others. It uses ~1.5m of filament and prints in ~30m at 0.2mm layer heights, with ironing for a nice top surface. (However, it was designed for printing at 0.1mm layer height, and it is much prettier!)

Attached gCode for a Prusa Mini+, as that's what I used to design it.