There are a bunch of excellent deck boxes already available for Keyforge, but I wanted to make one as slim as possible, which was also robust and transparent enough to see the deck inside (with the right filament).

To do this, I used the Vase Mode/Spiralize function to create a single walled case the precise size for my sleeves, with a friction-fit lid.

I have both Dragon Shield and Ultra Pro sleeves, so created files for both of these. The Ultra Pro box is smaller due to the smaller/thinner sleeves.

There isn't much margin for error in these deck boxes, so you might need to tweak your settings for your own printer and materials. I had to experiment a lot to find the right balance between fit/slimness/sturdiness, and I've included the settings that worked for me below.

I would strongly recommend using PETG for these boxes, as I found that when printed with PLA the bottom would often break, whereas the PETG versions are very sturdy.