This is a deck box for trading card games. It was designed specifically for the Commander format of Magic the Gathering. It fits 100 cards with a little room for Token cards and such.
It fits in most of the deck box cases my friends and I have.
Closed it is about 3" x 3" x 3.87"
Supports are not required
Originally posted at thingiverse by myself. https://www.thingiverse.com/thing:5215344