Custom cut to fit inside an Altoid's tin (well.. the blank ones we carry; an actual Altoid's tin is a hair wider than our blank ones). Laser cut from medium weight chipboard.
Could be for a spooky Halloween picture frame, or the Evil Queen's mirror.
Instructions: You have to kinda tilt it to slip it in. Then hook a finger inside and pull it forward to snug it up against the front. It stays put pretty well but I would add glue to it for a permanent assembly.
Design Team Member Laura Carson made a Grimms' Fairy Tarot (see the wide photo below). More info in the blog and/or see the supply list.