The Hartman EW System for small retaining walls consists of plastic stay-in-place forms that are 1 foot height by 5 feet long and 2 feet wide. These forms look like hand laid stone walls for a pleasing aesthetic look. They are filled with sand, stone, concrete or recyclable material to give them their weight and can be stacked on top of each other to form small retaining walls. They are lightweight and easy to install. No skilled labor is needed.