This dice tower uses magnets to hold open the dice tower while also connecting the tray.

Fully closed
4-1/4" (108mm) Wide x 4-1/4" (108mm) Deep x 3-1/4" (83mm) Tall

Fully opened
4-1/4" (108mm) Wide x 7-1/32" (178mm) Deep x 6" (153mm) Tall