7" tall x 8-1/2" wide. 5" deep when closed (the large shadowbox is 3-1/2" deep, and the 2 smaller shadowboxes that form the "doors" are 1-1/2" deep).
These Theatre Cabinets are similar to the smaller Apothecary Cabinets (with doors that can be paper hinged (or metal hinged) onto the main center section — and with space in the "doors" for scenes).
This is the same width and height as the Simple 7 Inch x 8.5 Inch Shadowbox, so the Wrought Iron Shadowbox Header designed for these cabinets also fits the box.
See the Large Theatre Curtains, Columns & Box Seats Set Download (linked below) for a set of 5 large curtains (and other pieces), sized for this cabinet.
This deeper version can accommodate some 1:12 scale furniture. See artwork using a 1:12 table inside a similar box (also 3-1/2" deep).gryGD GND