Inspired by Tridense's excellent Uno Cards Hardcase, here's a playing card box that can be customized using the FreeCad source file.

All you have to do is open the settings spreadsheet included in the Freecad file and adapt the dimensions of your card deck, your print settings and the name that will appear on the box.

You'll also need to specify the path to the font to be used for the text.

I heartily recommend the Persona Aura font by MJType.

For those in a hurry, I've also added stl exports of my Uno and Tarot boxes.