Stone Edge Surfaces Single Stone decorative concrete stamp set for Stamped Concrete, Decorative Concrete, Concrete Overlay. The Single Stone stamp set comes as a set of 5 stamps, with all 5 being single stones. The stamps are designed to create a random look with large or small stamps being placed in any configuration to create tighter grout joints to completely custom wide grout joints. This stamp set does require hand carving to remove the material between the stamps to create the grout joints. Each stamp has 1 handle and range in size from 12″ x 12″ to 9″ x 9″.