A male Saint Bernard can get up to 180 pounds and is known for being extremely protective, according to the American Kennel Club.
While the average Mastiff can stand about 30 inches tall and weigh up to 230 pounds, they are said to be gentle giants.
These dogs work hard and play harder. They are historically known as working dogs, and their muscular exteriors prove it.
Traditionally, huskies have worked as sled dogs, pulling large loads to their destinations.
While they are a bit on the smaller side, weighing between 65 and 80 pounds, they are still extremely agile and powerful.
According to Hill's, Great Danes fall in two categories of breeds: Working and Guardian.
These dogs are skilled hunters and are known to be powerful athletes as they have both a muscular build and speed.
The Irish Wolfhound just looks intimidating. It is actually too sweet to be a guard dog.
German Shepherds have one of the most powerful bites, which is why the breed is often used for law enforcement, military and protection.
Though they have a large and powerful stature, Newfoundlands are also known for their sweet temperament.