Guinness said Monday that he stands 3 feet, 7 inches tall from paw to shoulder, which is three-quarters of an inch taller than his closest rival -- Titan, a white Great Dane from San Diego.
The 4-year-old Titan took the title of world's tallest dog in 2009 after Gibson, a Great Dane from Grass Valley, Calif., died of bone cancer.
Guinness officials say there were conflicting reports about Giant George's height, so they sent a judge to verify it. The 4-year-old is owned by David Nasser.
