Puffy stickers came as 4 characters: Batman, Superman, Supergirl, and Wonder Woman
These are most commonly found on the red header cards, shown below.
These were also found on the Blue header cards, though quite rare.
Wonder Woman blue header photo: Kristin Smith
Puffy Stickers & Album came in a larger package with a cardboard backing, and came with characters not available in the sets of 4 above. Characters include Hawkman, Flash, Green Arrow, Penguin, and Aquaman.