“What is the biggest dog in the world?” You may ask, well it depends on what you mean; tallest, largest, or longest. Let’s see:
The tallest dog breed is the Irish Wolfhound. The Irish Wolfhound can stand a whopping 7ft tall, and the minimum of 32 inches at the shoulder.
The largest dog breed is the English Mastiff at a whopping 28-55 inches tall 44-53 inches long.
The longest dog breed in the world is the Australian Cattle Dog. They can get the length at 28-33 inches!