Rock a Block Pack of 4 is an innovative and unique rubber stamp mounting system design to make stamping as easy as possible.The Rock a Blocks have a curved face and innovative depth guide which means when you are stamping an even amount of pressure is being applied to the paper to ensure a consistent flow of ink throughout the stamp. Rock-a-Blocks are packaged in a set of four including 6\'\' x 4\'\', 6\'\' x 1?\'\' , 4\'\' x 3\'\' and 1\'\' x 1\'\' so they will work with many different rubber stamp sizes.. Innovative design. Includes 6\'\' x 4\', 6\'\' x 1?\'\' , 4\' x 3\'\' and 1\'\' x 1\'\' stamps. Suitable for a wide variety of stamps. Perfect rubbing stamping every time. Approximate dimensions (mm) H 297 W 222 D 31. Weight 245G