MiR Field Tile 2" x 12" Polished Natural Stone Chair Rail MoldingThe 2" x 12" polished natural stone tile that you are referring to is the MiR Mosaic Field Tile. A sort of molding or trim that is placed horizontally on walls, frequently at the height where a chair might rest against it, is referred to as a "chair rail" in most contexts. According to this context, the tile "Chair Rail" is intended to be used as a trim piece or decorative border along walls, possibly in bathrooms or kitchens.