The longest and heaviest dog ever recorded in history was an English Mastiff named Aicama Zorba of La-Susa. A true giant among canines, Zorba was a proud British dog who measured an incredible 37 inches tall at the shoulder and weighed over 343 pounds. His extraordinary size made him a legend, securing his place in the record books. While breeds such as St. Bernards and English Mastiffs are often admired for their massive build, they surprisingly don’t claim the title of the tallest dogs. That distinction usually belongs to the majestic Great Danes and the regal Irish Wolfhounds, whose towering heights captivate dog enthusiasts worldwide.