A bathroom whether it is an independent unit or attached to a bedroom will always have tiles running around all wall surfaces. I some cases the tiles are fixed up to 4 feet height and then the wall are painted with a waterproof painting to prevent the seepage of water into the brick walls.
If you bathroom is small, you can use this to your advantage. Normally the small or big size of any space is perceived because of the border walls of any room. Using unique flooring and wall decor ideas you can easily remove the perception of borders and the room looks bigger.
You can do this by creating a flooring pattern in the bathroom using tiles and then continue this pattern on the walls as wall decor theme. You can do this up to 4 feet height as well. This will break out the dimensions of the bathroom and it will appear bigger.
Thus bathroom wall decor plays a major role in how the bathroom look when finished this because unlike every other room in your home, a bathroom has a limited number of furniture and decorating accessories available.