Kiwi Co Memory Card Box

We got a neat Kiwi co koala box with some insect memory game cards, but they kept getting scattered around the room. I quickly generated up this hexagonal shaped box and lid set to keep the cards contained.
You should be able to print them with enough accuracy for a tight friction fit, definitely with something more flexible like PETG. Otherwise, oversize the lid a bit and use a rubber band or something to hold the two halves closed.

My stack of cards measurements I used for the box:
Height: 10mm
Corner to corner (Diameter): 72.5mm
Face to Face: 63.5mm