Just finished this up in my shop. The wood was 3/4" oak, but over the years it weathered down to 5/8". I have wire brushed the wood and applied a coat of matte finish to seal the wood. Overall the shelf is 24" wide, 10" tall, and 3 3/4" deep. The shelves are 18 1/2"" wide, and 3" deep. I placed felt bumpers on the back to protect the wall it is placed on.
Shipping is exact cost (6 lb 3 oz) from zip code 45601.
If you have any questions, feel free to ask.