NOTE: This is a WIP, and part of a larger project. Things might change. 

To create a card box, copy all 4 SCAD files into the same folder, edit CardBox.scad to set the dimensions, and render. 

The main variables are:

//width of a card
cardWidth=63;
//height of card
cardHeight=88;
//inner height (height of stack of cards, plus a bit for comfort)
ih=25; 
 

Those, for the most part will get you what you need. You can also alter the type of latch, and add text or graphics to the top.