Fill your fan-folded card holder with business cards, postcards, old photos or even a recipe card or two (cute idea for a cookbook). For more ideas for book crafts, check out the book “Playing ...

The card holder measures 109.1×65.7mmx11.5mm. Which means it is just 11.5mm thick. It is smaller than the average smartphone and has a 180° arc which is designed to give a comfortable grip.