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

I generally print mine in .12 as I'm not strapped for time on my prints.
.2 turns out fine as well though with some of the steps on the angles of the lid and base being more noticeable.