Traditional backsplash goes up to 4 inches from the countertop and the rest of the wall space was exposed drywall. These small pieces of stone were cut from leftover slabs. However in the recent years it has been popular to tile the backsplash all the way to the kitchen cabinet therefore making it more interesting. it is the more one of the most visible parts of the kitchen and many tile designers prefer to dress it up. Usually Mosaics are used in back splashes to make it interesting.