20 stamps/page * 5 pages. You got 100 stamps in total.
Background: In recent decades, Day of the Dead has caught on in the United States as a festive and increasingly popular celebration for all ages. These new stamps will be the first issued by the U.S. Postal Service to mark this holiday. Luis Fitch designed and illustrated the stamps. Antonio Alcal was the art director.
Here are the Scott catalogue numbers: 5640 Girl's Skull with Bow a. Imperforate 5641 Man's Skull with Hat a. Imperforate 5642 Woman's Skull with Curled Hair a. Imperforate 5643 Boy's Skull a. Imperforate b. Horiz. strip of 4, #5640-5643 c. Imperforate strip of 4, #5640a-5643a