MiR Sierra 0.6" x 12" Glossy Glass PencilThe MiR Mosaic Sierra 0. 6" x 12" Glossy Glass Pencil. This type of tile is typically used in decorative applications such as backsplashes, accent borders, or mosaic designs. The "0. 6" x 12"" dimensions refer to the size of each individual tile piece, with a glossy finish indicating a shiny, reflective surface. Glass pencil tiles like these can add a sleek and modern touch to any space.