You can use the same measurements as plywood (or cardboard or aluminium) ( recommended plywood or wood boads) . Drag &out all sections of box .. Then fix all the parts as shown blow in model files.
You should use the same measurement of plywood (or cardboard or aluminum) (recommended plywood or wood boards) . Drag in &out to view all the sections of box . then fix all the parts as shown below in model files.