Concrete Block, with rough face to look like raw granite block. 24" x 12" x 4" thick. light and dark grey colors. smooth on 4" sides and back. Bought them to face a retaining wall but used stone instead. Would make great boarder around gardens, walkways or even for a fire pit. Can deliver locally or further for a fee. If interested call Ed @ 401-742-6767. Location: Cranston it's NOT ok to contact this poster with services or other commercial interests rhodeisland