Here is my Mini Lithopane box for small spaces.

It is 105mm x 80 mm x 55 mm.

The lid comes off and you can change the lithophane inside the box as you desire.

For this model I made 4 lithophanes and slid each one in and out. It is a snug fit but the lithophane will snap right into the slot and then you can put the lid back on.

I used https://lithophanemaker.com/ to make the lithophanes.

Each Lithophane MUST BE this specific size below or slightly smaller to fit snug in the frame. I would not change the dimensions by more than .15mm smaller in size.

100mm width, 75 mm height, 6mm depth and 6mm base height.

The lights are used are:

https://www.amazon.com/dp/B0BN86G8RR?ref=ppx_yo2ov_dt_b_product_details&th=1