Consistent thickness and a natural stone texture blend together in Dimensional Coping for the perfect finish to retaining and freestanding walls. The 12.5-by-24-inch (318-by-610-millimeter)  and 12.5-by-18-inch (318-by-457-millimeter) pieces, as well as 12.5 by 19-inch (318-by-483-millimeter) end pieces, create perfect seat walls, too!