Set of three sizes. Craftools are an investment that will last for years to come! Geometric stamps are used for many decorative and special effect purposes. With just one geometric tool, you can cover a large area with a nice design in minimal time. Our book, "Tech Tips" #66056-00 by Al Stohlman, shows some examples of designs created with geometric stamps. "Luck 8 Belt Book" #6051-00, also has some good geometric design examples. Approx. stamp dimensions: Sm-3/16x5/16, Med-5/16x7/16, Lg-3/8x9/16.