Description: 1959 KELLOGG'S vintage print advertisement "Protein!" -- Kellogg's Special K -- more than a flake or a puff -- a wonderfully delicious new way to get your protein. Kellogg's of Battle Creek. -- Size: The dimensions of the half-page advertisement are approximately 5.5 inches x 11.5 inches (14 cm x 29 cm). Condition: This original vintage advertisement is in Very Good Condition unless otherwise noted.