This trading card holder comes with two different styles! This version is intended for cards with a protective sleeve with a slot of 68mm.
See my other design for a narrower slot if you display cards without a protective sleeve:
https://makerworld.com/en/models/222880#profileId-240900
Looks great with PLA, SilkPLA, PETG and even Translucent PETG.
All materials have been tested!
Feel free to use commercially!