Abstract: A stamp for forming customized designs and decorative edging in concrete surfaces of varying size and shape. The stamp has a smooth contact surface and a ridge that defines a pattern that is imprinted in sufficiently hardened concrete. The tool also has measurement markings and reference points that can be used for positioning the tool in a desired location. The stamp has the property of being able to be placed adjacent to another tool or imprint that is out of horizontal and vertical alignment without interfering with the adjacent tool or imprint. The stamp also has the property of being able to overlap a previous stamp placement without interfering with the imprint formed by the previous stamp placement.