Just completed my 8th project and am pretty pleased with the results. I started with an Amazon box
And ended up with the following
I recommend using boxes and Amazon boxes that your dolls are delivered in particular because the length of the box will make it a perfect Diorama (height wise) backdrop and if you don’t want the display anymore, you can reuse the box as storage for all your Diorama parts to play with later.
Nuts About Dolls 