The biggest dog breed by weight is typically the English Mastiff, holding records for the heaviest individual dog ever, like Zorba at 343 lbs (155.6 kg). For height, the Irish Wolfhound is often cited as the tallest breed, with some individuals exceeding 3 feet at the shoulder. However, the Great Dane (like the record-holding Zeus) is also a top contender for height, while breeds like the Newfoundland, Saint Bernard, and Leonberger are also among the giants.
Great Dane (32 inches)
Known as the "Apollo of dogs," the Great Dane combines strength and elegance, with males standing at 30 to 32 inches (76 to 81 centimeters) tall. This giant breed has held records for the world's tallest dogs, including notable individuals like Zeus and Giant George.
While cane corsos are one of the largest Mastiff breeds, they can't compare to the size of fully grown Great Danes!
Record size
According to the 1989 edition of the Guinness Book of Records, in March 1989, when he was 7 years old, Zorba stood 37 inches (94 cm) at the shoulder and was 8 ft 3 in (251 cm) from the tip of his nose to the tip of his tail, about the size of a small donkey.
The heaviest dog breed in the world
A fully-sized male can reach an enormous 250 pounds – the equivalent of a heavyweight boxer – but there have been stories of English Mastiffs exceeding 300 pounds. Much like the other dogs mentioned in this article, these big-boned brutes are incredibly good-natured and easy-going.
Weight range: 120-230 lbs
The Mastiff has a strong claim to being the biggest dog breed in the world. It may not stand as tall as some — in comparison to the Great Dane or Irish Wolfhound, as we'll find out — but it's a large, thickset dog that can top 230 lbs and more. It's a giant of a dog.
The 3-3-3 rule for dogs is a guideline for the adjustment period after adoption, outlining three phases: 3 Days (decompression, feeling overwhelmed/scared), 3 Weeks (starting to settle in, learning routine, personality emerges), and 3 Months (feeling secure, bonded, and truly at home). It helps new owners manage expectations and be patient as their rescue dog transitions, emphasizing calm energy, routine, and space in the early days to build trust.
What Is Considered a Giant Dog Breed? Dogs are part of the 'giant' category whenever they reach roughly 90 pounds—though some begin considering dogs as giant once they're 100 pounds. Although this is the lower weight range, giant breed dogs can easily reach the mid-100 range or even into the 200-pound category.
Kabuso, the famous dog behind Dogecoin and several other meme tokens, passed away on Friday. His owner announced the news of the 17-year-old dog's death in a blog post. "She quietly passed away as if asleep while I caressed her," wrote Atsuko Sato, expressing gratitude to Kabosu's fans, the face of the "Doge" meme.
The "heartbreak breed" refers primarily to the Great Dane, nicknamed this due to their affectionate nature combined with a relatively short lifespan (around 7-10 years) and susceptibility to serious heart conditions like dilated cardiomyopathy (DCM), making losing them particularly difficult for their devoted owners. Other giant breeds like Irish Wolfhounds, Bernese Mountain Dogs, and Saint Bernards also face significant health challenges, including cancer and heart disease, often earning them similar sentiments from owners.
Here are some of the smartest dogs by breed and the features that make them so clever.
Irish Wolfhound - 71-79cm, 40-54kg
With an average height of 76cm (30 inches) and often much taller, the Irish Wolfhound is unmistakeably a giant.
The Most Famous Dogs in History
She was 18. Kabosu's owner, Atsuko Sato, said her dog died — “crossed the rainbow bridge” — Friday, May 24. “She went very peacefully without suffering, as if falling asleep while feeling the warmth of my hands petting her,” Sato said.
The Department of Government Efficiency (DOGE) was an initiative by the second Trump administration in the United States. Its stated objective was to modernize information technology, maximize productivity, and cut excess regulations and spending within the federal government.
Great Dane
Despite their large size, Great Danes are often described as gentle souls. They are generally calm and well-behaved, seldom getting worked up over loud or vigorous stimuli. They are also typically affectionate and enjoy being around their human family members.
Longest-lived dog breeds
Reggie, a 7-year-old Great Dane, holds the Guinness World Records title for tallest living dog: He stands a remarkable 3 feet and 3 inches tall at his shoulder. Pearl, a 4-year-old Chihuahua, couldn't be any less like him, at just 3.59 inches tall and holding the title for shortest living dog.
The seven second rule. Put the back of your hand on the pavement. If you cannot hold it for seven seconds, it is too hot to walk for your dogs. This rule also applies to dogs riding in the bed of a pickup truck.
The most commonly surrendered dog type is the "pit bull type" (including mixes), often due to negative stereotypes, breed-specific legislation, and high energy levels, followed by other popular breeds like German Shepherds, Huskies, and Labrador Retrievers that may not fit owner lifestyles. Breeds like Staffordshire Bull Terriers (especially mixes) also top surrender lists in some regions like Australia.
A maximum of 2 cats and 1 dog of an approved small breed is allowed to be kept in each residential unit under the Housing and Development (Animals) Rules 2024.