If you need a vertical display 10-12 inches wide, print two of these feet out of PLA and screw the feet to the end of the shelf.

Pre-drill the screw holes or you'll split the shelf. At my local big box home store, a 12" x 36" Rubbermaid book shelf is about $13.

The thickness of the bookshelf is 16.39mm

It is quite stable unless you overload one side of the shelf.

I built this to show off 3d printed items at flea markets and other shows.

Printing two feet took about 3 hours on my Bambu lab printer, and consumed about 160 grams of filament.

If you use the 3MF file, that is two feet printed at once. You may have to change the orientation of the objects to fit your bed.

Make a few of these if you need to corral puppies in an area, and it makes a 10" / 12" high wall that's easy to move.