The tallest breed of dog is the Great Dane. These majestic dogs are known for their impressive height, often exceeding 30 inches at the shoulder, with some individuals reaching over 7 feet when standing on their hind legs. Great Danes are gentle giants, characterized by their friendly demeanor and loyal nature, making them great family pets despite their size. Originating in Germany, they were initially bred for hunting large game. Their calm disposition and affectionate behavior contribute to their popularity. However, prospective owners should be prepared for their space and exercise needs due to their size.