Hi, i've designed a cardtray for boardgamecards. The attached STLs are for mini american SLEEVED cards 41x63mm, like the ones from Zombicide (picture), and the other one is for standard cards in sleeves too 63.5x88mm. Both are 30mm high.

If you want/need some other dimensions, load the freecad-file and edit the spreadsheet to your measurement, then export the body to STL.

Feel free to do everything you want to it.