By height, the tallest dog breed is the Great Dane. They can reach up to 32 inches tall at the shoulder.
By weight, the heaviest dog breed is the English Mastiff. They can weigh upwards of 200 pounds, though some have been recorded at over 300 pounds!
Other contenders for "largest" include:
* Irish Wolfhound: Known for their height and lean build.
* Saint Bernard: Large, powerful dogs with a gentle temperament.
* Neapolitan Mastiff: Heavy and imposing dogs with a wrinkled appearance.
Ultimately, which breed is the "largest" depends on your criteria. But these breeds are all considered among the biggest in the world!