Hi guys,
I am new here, however I enjoyed a lot your work ( @CompC & @EmanueleBGN ).
So here I am to also contribute with my work.
I made a box for the many cards I made thanks to your many designs. They are made to fit my 63 x 88mm cards (MTG cards, same ratio as CompC cards)
This is how it looks when finished :


and here is , attached to this post, the model I made, with SSBU cover, as it the best image I found with a lot of Nintendo characters. If someone have a better idea, I might do another design ^^
It's made to print in 600ppi, on A4 sheet

 

I didn't even seen you already made a cardbox.
Those are done from scratch.
they can contain around 50 cards, however my card are made with some premium glossy paper (280g/m²), same as the box, and are thinner than PVC cards.