I had this in the garage ... I had bought three last year when they were being cleared for $5 each.
The shelves were 12" wide, so I used 4 and a half shelves. I attached them together with a board at the bottom, and trim at the top.
I primed and gave it a partial coat of blue as I wanted blue showing thru in my antiquing.
Then a couple coats of white and sanded it back.
Oh my ... I love it!
Then I hung on the wall over my bed.
Exactly what I wanted.