This leaning shelf was the perfect solution to my tiny (and tiled) bathroom. I didn't want to have to put screw holes in the walls and have been searching for a project.
I made the shelves out of reclamed barn wood which made the project a little bit harder to get perfect square and level but it was worth it. The legs are 2x4s. The hardest part was definitely making sure the shelves were level on the legs. Lots of clamps helped!