Hi, I recently picked up a nice shelf unit on e-bay. This shelf was made for the Franklin Mint to hold famous diecast pewter locos and is equipped with N-scale track on each shelf. The shelf unit measures 21" wide by 12" high and 1-1/4" thick. The shelves are 1/4" on 2-1/4" centers. Hope this picture posts...it's my first try.