Pretty much what the tite says. It's for a homebrew project (Not SMS) I'm not looking for storage solutions like a card binder (although, that is pretty neat and the best way to store SMS and PCE games IMO) I really just need something as big as a SMS card case, but every case that mentions that could hold SMS games don't mention the cards. And no, I'm not willing to cannibalize existing cases for a project. That's just evil.

I've looked all over, and all I can find are some cases from ONE PERSON in china that can hold gift cards, but I don't know how they're structured for what I want to use them for, and I don't want to blindly buy a minimum of like 10,000 either.

Although I am using this for unrelated project, it is a shame that there's no other solution for anything SMS card games. SMS card cases just don't exist.

Could they be CD sized like PCE/TG16 cases?

I'm personally going for more of the SMS sized ones. I've seen some 3D printed card trays to use in CD cases which worked for TG16/PCE, but I'm not into those.

If I can't think of a solution, I may go with a regular Genesis cart style case and use a foam cut-out insert for the card, but man those cases are a bit thick.