As the name suggests, Castle Rock Cobble is irregular in shape and size. The stone is graded to a 3"-6" bed depth and the stones average 6"-12" in size. 30-35 square feet of coverage, per ton, can be expected. Cobble lends itself to a rustic, old world look and is recommended tumbled to further achieve that appearance. Castle Rock Cobble is an ideal selection for fireplaces, chimneys, wood-burning ovens or as a wall veneer.