This article is from the Mastiffs Breed FAQ, by mmcbee@access.mountain.net (Mike McBee) with numerous contributions by others.
Adult males generally run about 160-230 pounds, females are
normally between 120-170 pounds. Males over 200 pounds are
not too uncommon and a few females reach these weights.
According to the Guinness Book of Records the record holder
for the world's largest dog is Zorba, a Mastiff, at 343
pounds. He stood 37 inches at the shoulder and was 8 foot 3
inches from the tip of his nose to the tip of his tail. Zorba
set this record in November, 1989, when he was 8 years old.
 
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