Retaining wall block concrete mold measures 9 1/2 inches from the front to back (measuring in the center of mold) - 11 inches across the front and 8 inches across the back. Height is 4 inches tall. Make your own decorative blocks with this Textured face Retaining wall block concrete mold set 3003 makes some beautiful concrete blocks. Use this mold with your own concrete mix to create your own borders and walls around flowerbeds, patio areas and more. All of our molds can be used with concrete, cement, plaster, soap and resin. Comes with basic instructions for creating your pieces. Our molds are made of several different blends of polyethylene plastic which allows you to use the molds over and over. Our plastic is somewhat flexible so it allows for your finished pieces to be removed from the molds easily. This is a mold to pour into to make your own stones.