Vitra Tiles USA presents the Modular Arkitekt RAL Color Series, an extensive line of glazed ceramic tile offered in 70 standard colors. The series comes in glossy, matte and two non-slip surfaces, and 14 standard sizes ranging from 1-inch squares to 24-by-36-inch sizes. The 4-by-4-, 2-by-4-, 2-by-2-, 1-by-2-, and 1-by-1-inch sizes are dot-mounted.