We have 2 of these shadow box curiosity displays, both with the same dimensions.
These are great pieces, there are 7 rows of compartments, perfect to display tiny items, miniature figures and the like, great for assemblage or collage art displays. also great just to store tiny dinosaurs.

Dimensions - 65.5cm W x 40.5cm H x 6.7cm D
middle display is 5.6cm H, others are 4.7cm H