The Great Dane is the largest dog breed, according to the Conservation Institute and About.com. The world record holder for tallest dog is the Great Dane Zeus, who died in September 2014 at age 5. He was 44 inches tall at the shoulder.
In general, Great Danes are 28 to 34 inches tall and weigh up to 200 pounds. Hip dysplasia and cervical vertebral instability are two health issues common to Great Danes. As with other large dog breeds, the Great Dane breed experiences shorter-than-average lifespans and lives for roughly eight years. Great Danes are known for being friendly and gentle.