It was dusty and harsh out in the wild west desert.  Those steely-eyed cowboys and cowgirls in the saloons would eye each other off over cards, waiting for the inevitable showdown when someone yelled "cheat"!  But, that begs the question: how did those ruffians keep their decks of cards safe in between games, assuming they survived the latest altercation?  3D printing, that's how.  Barkeep would run off a bunch of 3D printed card cases like this one, and dispense them to the hardy desert folk, keeping those precious card decks intact. 

This one is sized for what Queen's Slipper calls “standard” and Bicycle calls “bridge”.

If you're after one sized for what Queen's Slipper calls “poker” and Bicycle calls “standard” you'll find it here:

https://www.printables.com/model/507855-poker-sized-simple-card-box