Ashtar

A star-system far beyond Earth's own, which contains a planet that is inhabited by a race of humanoid giants. The race's princess, Allura, once journeyed to Earth and developed an attraction to Jimmy Olsen, who had taken a chemical compound that enabled him to become a giant himself. Ashtar's planet of giants is also the current home of Titano, who lives happily among other giant apes ... including his mate (SPJO No. 77/1, June 1964: "The Colossus of Metropolis").