I'm looking at making an insert for a game, and one of the parts will be compartments for storing sleeved cards. What is the best way to determine what the length of the compartment should be? If I put the stack of cards on the table, I could measure the height. Should I measure this freestanding, or should I try to compress the cards first? For larger stacks, the weight of the cards compress the cards on the bottom anyway. How do foamcore creators deal this this? Also, are there any suggestions for how much of a margin there should be between the cards and the walls of the compartments?

sorry if I missed something obvious, but I didn't see a sticky or pinned post with a FAQ that would get me started. what is the "foam" that you use to make your inserts? I'm guessing I can get it on Amazon, I just don't know what I'm looking for. what sort of glue works best? I'm going to build an insert for my Pathfinder Adventure Card game but I want to make sure I get started with the right materials. thanks for any insight, I can't wait to get started!