For whenever you need packaging of fatter items: card sets, business cards, etc. Note the different style of enclosures: the scalloped-edged one has velcro dots for resealing, the business card one has a slot and tab, and the envelope one has a self sealing strip for mailing. I've also made them out of chipboard before, as a box for handmade journals. This tutorial is in a print-friendly jpeg format. Just double-click on the pics to enlarge, then read or print.