Hi Jericho, thanks for reaching out. For a game that's fast, fun, and easy to play, it's probably a good idea to choose one of the standard playing card sizes with which folks are already familiar. So, say, a 2.5" x 3.5" deck printed on 300 gsm coated paper could be perfect for your games. But the devil's always in the detail! The best thing is to have a chat about your project and decide together what would be the best solution for your needs. We've asked one of our experts to contact you via email, so keep an eye out for that (don't forget to check your spam folder and add us to your safe list!). In the meantime, you can find out more about card design specs here: https://www.qinprinting.com/game-card-printing/ We hope that helps. If you have any other questions, just ask. We look forward to working with you!