The Ledgestone 3 Pc. Design Kit is a combination of three extra-large, square and rectangular, modular shapes with prominent, bluestone-like clefts on their surfaces. The 18 x 18 modular component is packaged separately from the other three combined shapes in Ledgestone 3 Pc. Design Kit. Both Design Kits and the 18 x 18 shape are also available in Ledgestone Renaissance for an aged appearance.