I wanted a way to store playing cards that wasn't the cardboard boxes from the store. So, I made these and they are working great.
There are generally two basic sizes of playing cards. One is called "Bridge" or "narrow" and is 2.25" x 3.5". The other is called "Poker" or "wide" and is 2.5" x 3.5". Most poker rooms in USA use Bridge sized cards to play poker. So, I don't know how the names got mixed up.
Different players prefer different sizes so I made boxes for both.
I also make one or two deck cases. Poker players generally have a "setup" of two decks with different color backs which is my general usage. However, you may want a box for just a single deck so I made those as well.
These fit the KEM, Copaq, DaVinci and other well known all-plastic playing cards. They will also fit most paper cards.
The boxes also stack with the cards flat and have ridges to help keep them in place. They only stack with the same size decks. That is Bridge won't (necessarily) stack on Poker, etc. One deck and Two deck boxes of the same size will stack.
The latch is intended to just help keep the box shut with normal handling. It won't keep the lid on if you attempt to shake it open by the bottom with the lid pointing down. If you need that level of security you could throw a tight rubber band around the box top-to-bottom to keep the lid on securely.
I printed the boxes in the photos with PETG in semi-transparent red or blue. I really like the look of those. I have also printed them in PLA. In both cases I used a 0.4mm nozzle at 0.2mm layer height and 100% infill as the walls are not very thick.