You may have the need for a large wall that has a bit of a formal look to it, yet fits into your landscape in a very natural way. We offer a pre-cast concrete retaining wall system that is recommended for larger walls. Each block is 8 inches thick, 18 inches long, and 12 inches deep. Each piece weighs 74 pounds. Colors include oakstone and pecan. This block must have a cap which is a diamond block cap.