The last time I played the tabletop game The Resistance, I realized that it was sometimes difficult to see information that was needed to make decisions in the game, specifically the mission and leader cards. It seemed that if these cards were standing up in front of the player with the card, it would be easier to quickly follow what was happening during the course of the game.
An easy solution was to create a small holder that the cards can be inserted into so that they stand up. Many other games include these card stands as game components, but for those that do not, now there is an easy way to create custom card holders.
The customizer can be used to generate a holder that fits your specific game piece, simply measure the thickness of the game piece in millimeters and enter that value into the customizer.