The design elaborated above is a real good one. But people may have different requirements, different sizes. So, I must suggest to get in contact with some local and professional company to get it done for you.
Coolpeter, I agree with you that people may have different requirements and sizes. However, I think anyone who installs their own back splashes are smart enough to adjust the sizes to fit their individual requirements without the help of a professional company. It's not that hard to use a tile saw to cut the tiles to the exact sizes a person may need to use. As long as the person remembers to measure the space and adjust the sizes first, there shouldn't be any trouble with following the instructions that have been provided in this article.
However, I do think that it's sometimes easier and less of a hassle to have a professional do the work. And in some instances, it may even be less expensive to use a professional if the person doesn't know how to use the various tools very well or know how to choose the proper materials for the project.