1. Great Dane
The Great Dane is the tallest dog in world. A member of this breed named Zeus, has held the title of World's tallest dog since 2005. This breed varies greatly in size and can weigh anywhere from 110 to 180 pounds.
2. Newfoundland
The Newfoundland is a working class breed that is often used in water rescue due to their excellent swimming ability. The average weight for these dogs are around 140 pounds.
3. Irish Wolfhound
The Irish Wolfhound, as the name would suggest, originates from Ireland and was created for hunting wolves. They have also been used for guarding as well as war dogs due to their formidable appearance. Most of the time, the breeds weighs around 120 pounds, but some members have reached as heavy as 180 pounds.
4. Leonberger
Due to this breed's thick hair that resembles a mane, the Leonberger is known as the lion dog. They have a golden coat, accompanied by a black mask around the face, making this a striking breed to look at. Males and females vary greatly between weight. Females tend to weigh between 90 and 130 pounds while males weigh between 100 and 160 pounds.
5. Bernese Mountain Dog
The Bernese Mountain Dog has a history of working as a farm dog and also driving cattle along the alpine pastures in Switzerland. Their signature tri-colored coats gives them their recognizable appearance They weigh between 70 and 120 pounds.
6. Dogo Argentino
The Dogo Argentino is the ultimate big-game hunting dog and is used today to hunt wild boars. They are known for their bravery and will protect their humans at all cost. They weigh between 75 and 100 pounds.
7. Great Pyrenees
The Great Pyrenees has been traditionally used as a livestock guardian dog. They have a natural guarding instinct to protect the herd from predators, but they are gentle enough to not hurt young animals. They weigh between 80 and 120 pounds.
8. Dogue De Bordeaux
The Dogue de Bordeaux, also known as the French Mastiff, is an ancient breed from France. They are muscular and very powerful which made them ideal cart pulling dogs in the past. They were also used to guard flocks and European castles.They weigh between 120 and 150 pounds.
9. St. Bernard
The St. Bernard is the poster boy for search and rescue dogs. This breed became famous for saving people in the western Alps after avalanches or simply becoming lost. They are another breed that varies greatly in weight and can weigh anywhere from 140 to 260 pounds.
10. Neapolitan Mastiff
The Neapolitan Mastiff is another ancient breed originating in Italy. Due to their impressive size and guarding instincts, they make excellent guard dogs. They weigh between 110 and 150 pounds.