Sometimes, edges or trims are not necessary as in the case when the tiles butt against a cabinet, ceiling or window. In such cases, you can simply apply a thin layer of caulk on the top layer to give it a sealed look.
Use border and accent tiles
These tiles provide contrast to tile installations.These are available in a wide variety of designs, colors and shapes.
Opt for natural stone
Natural stones can be ground to form smooth edges. Marble, granite, slate and bluestone are examples.
Use radius or quarter trims
These are specifically made to edge the sides of wall tiles. They usually measure 6 inches and create a seamless effect to any tile installation.
There are many types of bullnose in market, you just need to find out which one is your preference