The four natural-looking colors in the Limestone palette are White Shell, Oyster Blue, Coquina (with an underglow of terra cotta), and Freestone (spiced with the merest hint of subtle hues so it melds easily with any number of other colors). The tiles are available in four sizes that can be combined in endless, unique patterns: six-, twelve-, and eighteen-inch squares, as well as 12" x 18" units.For total design flexibility, Crossville is also offering two styles of Limestone borders in each Basketweave and Tapestry allover embossed designs are available in 6" x 12" lengths with six-inch square corner pieces.