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Out of the hundreds of dog breeds found around the world, some qualify as giant breeds.

The range of size, shape, color, personality, and purpose for which dogs are bred is jaw-dropping.

Over centuries, different dogs in different geographic locations have been honed by humans to play certain roles, from hunter to guardian, from herder to companion.

For some of these breeds, size has been a significant player in the search for perfection, whether that was to hunt bigger or faster game or guard a home with more intimidation, or even just to have the mass to survive in freezing locations.

Of the hundreds of dog breeds around the world, here are nine of the largest.

1. Great Dane

On average, Great Danes stand around 28-30 inches tall.

The Great Dane is widely recognized as the largest dog breed by the American Kennel Club, at least in terms of height.

The Great Dane is a breed of German origin, and its German name Deutsche Dogge means German mastiff.

However, before setting down official roots in Germany, the dogs that eventually became the Great Dane breed came from a crossbreed between English mastiffs and Irish wolfhounds.

Though they aren’t the heaviest dogs, reaching around 100-120 pounds, they are among the tallest.

The average Great Dane stands around 28-30 inches tall, but often they can be taller.

The world record holder for the tallest dog was a Great Dane named Zeus who stood an astounding 44 inches tall.

However, these big dogs trade longevity for their size and live only to be between 6 to 8 years old. Zeus died of old age at just 5 years old.

2. Neapolitan Mastiff

The Neapolitan mastiff stands between 26-31 inches tall and weighs a hefty 150 pounds.

Mastiff breeds are certainly among the largest dog breeds in terms of sheer mass.

The Neapolitan mastiff originated in southern Italy.

Used as a guard dog, the average male mastiff stands between 26-31 inches tall and weighs a hefty 150 pounds.

Females are usually a little smaller, standing a few inches shorter and weighing around 110 pounds.

This breed is known for being fearless and protective of home and family, making it an ideal guard dog, but not an ideal warning system.

Mastiffs tend to be quiet and are known for sneaking up on intruders rather than barking to warn them off.

3. Scottish Deerhound

Scottish deerhounds can stand as tall as 32 inches and weigh as much as 110 pounds.

Going back to the leggy breeds, the Scottish deerhound gives away its purpose and origin in its name.

Originating in Scotland well before recorded history, the breed is a courser, once used to hunt red deer and easily chasing down its prey.

They are larger and heavier than greyhounds but are built similarly, with a lanky body meant for speed.

Deerhounds can stand as tall as 32 inches and weigh as much as 110 pounds.

Though they aren’t used for deer hunting today, the breed is kept alive by enthusiasts who use them for show and in some places, lure coursing.

4. Irish Wolfhound

Males often stand as tall as 34-35 inches and weigh upwards of 140 pounds.

Like the Scottish deerhound, the Irish wolfhound was bred to be a courser, and was indeed originally used to chase down wolves.

Developed from war hounds into a dog used for hunting and guarding, the Irish wolfhound is ancient and may have been brought to Ireland as far back as 7000 B.C.

Though their primary use was hunting, today’s dogs are fairly quiet and reserved, intelligent and easygoing.

The Irish wolfhound is the tallest of all dogs, even the Great Dane.

According to breed standards, the minimum height should be 32 inches for males and 30 inches for females. Males often stand as tall as 34-35 inches and weigh upwards of 140 pounds.

5. Dogue de Bordeaux

The Dogue de Bordeaux stands between 23-27 inches tall and weighs between 99-110 pounds.

The Dogue de Bordeaux goes by several other names, including the Bordeaux mastiff, French mastiff, and Bordeauxdog. But this breed, by any other name, still stands as massive.

Though other breeds, from the poodle and French bulldog to the Great Pyrenees and Basset hound, maybe more famous breeds of French origin, the Dogue de Bordeaux is one of the most ancient breeds of France.

The Dogue de Bordeaux stands between 23-27 inches tall and weighs between 99-110 pounds.

But though it is fairly average as far as mastiff breeds go, it does have one thing that sets it apart: It is reported to have the largest head of any canine in relation to body size.

Unlike the Neapolitan mastiff, the Bordeauxdog has been used for more than simply guarding house and home, though that was also in its job description.

6. Newfoundland

Newfoundland dogs stand an average of 26-28 inches tall and weigh as much as 150 pounds.

The Newfoundland is a working dog from Newfoundland.

Unlike many larger breeds, the Newfie wasn’t bred to be a guard dog.

Instead, its purpose was originally to help fishermen.

The big, muscular dogs are able to haul nets and lines from boats, pull carts, and, most importantly, fetch anything that falls overboard, including people.

The breed is an exceptional water dog and strong swimmer, and there have been many rescues of people out at sea credited to these big, gentle-natured dogs.

Newfoundland dogs stand an average of 26-28 inches tall and weigh as much as 150 pounds.

They look even bigger because of their thick double coat, which keeps them warm even in icy water.

7. English Mastiff

Growing to a height of 30 inches, these dogs can weigh as much as 230 pounds.

The English mastiff is one of the largest dog breeds recognized by the American Kennel Club. Growing to a height of 30 inches, these dogs can weigh as much as 230 pounds.

As a Great Dane holds the record for tallest dog, an English mastiff once held the record for the largest. In 1989, an English Mastiff named Aicama Zorba weighing 343 pound held the title of the heaviest dog.

Their size is a significant part of the breed’s past purpose, which included blood sports such as baiting bears, bulls, and lions.

Today, however, they are simply gentle giants, letting those courageous and fearless aspects of the breed’s temperament sit on the back burner while the mellow, even-tempered, and loyal sides come forward.

8. Saint Bernard

Dogs can stand between 26-30 inches tall and weigh anywhere from 120 to 180 pounds.

The Saint Bernard of brandy-toting fame is a breed originally created in the Swiss Alps and northern Italy as a rescue dog.

The monks of the Saint Bernard Hospice are credited with training dogs for rescue and for playing a role in developing the breed we know today.

Dogs can stand between 26-30 inches tall and weigh anywhere from 120 to 180 pounds.

Though they were originally used as rescue dogs to find and save travelers, today’s Saint Bernards are mostly family dogs. They are famous for being gentle, loving, friendly, and great with children.

9. Leonberger

This breed stands between 25-31 inches tall and can weigh as much as 170 pounds.

If the Leonberger reminds you of a Newfoundland mixed with a Saint Bernard, it should.

That’s exactly how the breed originated. In the mid-1840s, Heinrich Essig of Leonberg, Germany, crossed a Newfoundland with a Saint Bernard for four generations, then added in a Pyrenean Mountain Dog to the mix.

The result of these several generations of breeding is the Leonberger.

This breed stands between 25-31 inches tall and can weigh as much as 170 pounds.

Despite their size, they are simply giant family dogs.

Though their main purpose is as a companion animal, the breed does very well in everything from water rescue to tracking to herding.

If it is an activity that requires both strength and smarts, the Leonberger is probably going to be good at it.

At Treehugger, we are advocates of animal welfare, including dogs and other domestic animals.

The better we understand them, the better we can support and protect their well-being.

Millions of pets (including many purebreds) are available to be adopted from shelters.

We always recommend adoption as a first choice.

If you’ve decided to buy a pet from a breeder, be sure to choose a responsible breeder, and always avoid puppy mills.

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