Plywood box shelves: 2 boxes that are 4 7/8" deep, total of 20" long. One middle shelf in between with 9" between each shelf. Total height of 20.25"
Use 3/4" plywood and paint it all white with glossy finish for protection. We will use glue and brad nails so as to keep the sides pretty clean with only tiny holes from the nails. We'll spray on a good quality paint with some sheen to help protect the surface.