They measure 8"x4". They are small but will serve a purpose.
I think they turned out pretty good. But I have to confess something. I am not a wood worker. This was actually a larger shelf in its former life. It has been in the garage sale and no one seemed interested in it. I just walked by it and the ole light bulb lit up! That sure would make nice bedside shelves.
I just cut it in half and attached small blocks underneath and drilled pilot holes through the small blocks. I spray painted them a chocolate brown. I used screws through the pilot holes on the small blocks to attach them to the wall.
The only thing we bought was the paint. What a bargain! Theses are about the same size as the ones that came in our motorhome but they look a lot better.