What is the largest breed of dog in the world. The Old English Mastiff

The Old English Mastiff is the LARGEST breed of dog in the world. They can weigh anywhere from 110 pounds to the 343 pounds. Zorba,an English mastuff ,held the world record of the world's largest dog.

Most Mastiff males weigh around 160-230 pounds and females around 120-190 pounds. The hight of a mastiff can range from 26 inches at the shoulder to 36 inches.
The Irish Wolf Hound and Great Dane can be taller then the mastiff , but do not match the mastiff for weight and over all size .
The mastiff is also one of the most powerful dog in the world . My friends mastiff "Abraham " was the top weight pull dog in North America in 2004 "PULLING 7300 POUNDS

More on this subject can be found at http://mastiff25.tripod.com/