I love this little theatre! Roughly based on English puppet theatres.
Overall 8" tall x 5" wide x 3" deep.
Includes open sides for moving characters around. And a recessed roof for hiding wiring (if you want to add lights).
The window on front is 3-1/8" tall x 4" wide (and has a small lip at the bottom to hide footlights).
There are a number of facades and collage sheets sized to work with the theatre (see links below).
Note: Items cut from this heavy, light-grey chipboard burn easily so the laser-cutting process may leave charcoal residue behind. Save yourself a headache, and just wipe the cut edges of these items down with a dry paper towel before assembling or painting.