These diorama boxes are laser cut from sturdy chipboard. Overall approx. 12-1/2" tall by 8-1/2" wide by 3" deep. The "room" is square so works well as a 1:12 scale room box.
Assembly is required, but it's super easy with a slat and groove system. You'll need to apply quality glue to keep everything in place.
Shown below with a Wooden Bookcase w 4 Shelves (1:12 scale).gryGD GND