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Top 5 Biggest Dog Breeds

4 May 2023

Reviewed by Dr Jill McMaster BVM&S MBA MRCVS, Veterinary Surgeon and in-house expert at BorrowMyDoggy on 25 May 2023

There are big dogs and then there are BIG dogs. Do you know which ones they are?

Great Danes

These super-sized dogs can weigh up to 90kg. The world’s tallest dog is Zeus, measuring over 1.1 metres in height. Learn more about Great Danes here.

English Mastiffs

The overall heaviest dogs are English Mastiffs, which can weigh over 100kg. Fortunately, with good socialisation from a young age they tend to be friendly dogs. Learn more about Mastiffs here.


Newfoundlands often measure up to 74cm to the highest point of their shoulder blades. Even at 80kgs of weight, they excel in rescuing people from water. Learn more about Newfoundlands here.


Nicknamed ‘gentle lions’, their strong muscles weigh up to 68kg. Leonbergers have a well-balanced body, standing at 80cm tall. Learn more about Leonbergers here.

Irish Wolfhounds

Among one of the tallest dogs, they tend to be much lighter in weight than other giant breeds. When standing on their hind legs, they can measure up 2m tall. Learn more about Irish Wolfhounds here.

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Big dogs can be very loveable, but if you're considering getting one of your own always be sure you can meet its needs. Giant breeds need a good amount of space, are usually very strong and can be expensive to care for as well, so always do your research well before taking on a dog.

One way to see if a giant breed would work for you is by looking for a big dog to borrow. Or would you like your dog to go on extra walks with local dog lovers? Then sign up to BorrowMyDoggy today.

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