T-shape tile trim is a type of trim used to finish the edges of tiled surfaces, typically around the perimeter of a tiled area or where tiles meet other materials such as carpet, wood, or vinyl. The trim is shaped like a "T" with a base and a vertical section that covers the exposed edge of the tile.

T-shape tile trim is typically installed by inserting it into a groove created in the tile adhesive or mortar. The base of the trim is embedded into the adhesive, while the vertical section covers the exposed edge of the tile. This creates a clean and polished edge that protects the tile from damage and adds a decorative finishing touch to the tiled area.

In addition to its functional benefits, T-shape tile trim can also be used to create a transition between different flooring materials. For example, if tiles meet carpet or wood flooring, the trim can be used to create a smooth and seamless transition between the two surfaces, providing a professional and polished finish to the room.