Warner Bros. Put your own “stamp” on stationery greeting cards scrapbooks and more with Batman self-inking stamps. The Warner Brothers Batman self-inking 4 pack of stamps are great for party favors rewards game prizes or just a fun treat! These stamps feature fun Batman designs that all kids are sure to love. Just remove the lid and stamp away with these self-inking stamps. Each self-inking stamp is 1 inch in diameter and 1.375 inches high. Each package includes 4 Batman self-inking stamps that are great for kids ages three and older.