Stone: Chalkdust - TundraBrick TundraBrick is a classically-shaped profile with all the surface character you could want. Slightly squared edges are chiseled and worn as if they’d braved the elements for decades. TundraBrick is roughly 2.5″ high and 7.875″ long. Get a Sample of Chalkdust: http://www.eldoradostone.com/products/tundrabrick/chalk-dust/