A wall tile generally has a glazed surface and is available in a variety of colors, textures or hand painted designs, for use on walls only.
Wall Tile Trims
Bullnose – This is the most used trim shape for wall tile installations. Wall tile bullnose is sometimes referred to as surface cap. It has one rounded finished edge on the tile and can be used horizontally or vertically. For a 4" x 4" tile the industry number would be S4449.
Corner Bullnose – It has two rounded finished edges on the tile to be used to complete the corner where the horizontal and vertical bullnose meet. Generally you use only 2 – 3 pieces for a bathtub enclosure. For a 4" x 4" tile the industry number would be SN4449.
Stack-on Cove Base – This cove base provides a coving on the bottom and a flat edge on top to continue with more wall tile up the wall. For a 4" x 4" tile the industry number would be A3401.
Rounded Top Cove Base – This cove base has a rounded finished top like bullnose and is used as a cove base in areas that will not have wall tile installed above it. The industry number would be S3419.
The above trims are the most commonly used. There are many other specialty trims available that will only confuse you. Your tile installer will be able to look at your installation and know what trims will be needed. | 
