Great Dane: 100-175 Pounds AKC ranks Great Danes 16 out of 195 for popularity, so you've probably heard of these gentle giants.
The friendly dogs are on average 30 inches tall (to the shoulder), but can soar well beyond that when they stand on their hind legs.
Neapolitan Mastiff: 110-150 Pounds The next time someone says that you have a big head, just tell them to go look at a Neapolitan Mastiff.
These sweet and loyal dogs have a giant skull and long, droopy faces that you'll want to snuggle all day long.
Saint Bernard: 140-260 Pounds If you've ever seen the family-friendly Beethoven films, then you already know that Saint Bernards may as well be gigantic puppies
These playful and curious dogs are not shy about exploring the world and the people around
them, so training is especially important if you don't want them racing across the dinner table.