The Leonberger dog looks like a lion. Coming from Leonberg, Germany, this large breed may look bigger than he really is. Although this breed has a very thick coat, he still tops the charts at 115-170lbs.
Top 5 World’s Largest Dog Breeds The Great Dane is one of the world's tallest dog breeds. The world record holder for tallest dog was a Great Dane called Zeus who measured 112 cm (44 in) from paw to shoulder.Their large size belies their friendly nature, as Great Danes are known for seeking physical affection with their owners.source
This is the Dream Dog. The breed is called a Caucasian Mountain Dog, and this is one of the sires from Esquire Caucasians at (get this) NINE MONTHS OLD. He hasn't hit his full growth yet. Holy crap batman.