There are two versions of this board, one in a 6 by 2 layout that should suffice for most games of koi koi as there are not that many chances of needing more but if you want more there is an 8 by 2 model.
The cards slide in their slots easily and the side holes make it easy to grab the cards witout disturbing the rest.
I printed this in Bambu's wood PLA with 0.2mm layer height
The author marked this model as their own original creation.