How big do Bull mastiff Puppy get?

bull mastiffs will get VERY big, like 80-200 pounds depends on the parents, and the puppy!

Height: Dogs 25-27 inches (63-69cm) Bitches 24-26 inches (61-66cm)
Weight: Dogs 110-133 pounds (50-60kg) Bitches 100-120 pounds (45-54kg)

Bull Mastiffs get very, very big. Definately not the type of dog for someone who wants something on the smaller side.

Never choose a dog on looks or breed. Find the BEST MATCH for your situation.

Each dog’s needs and personality is different.

Go to http://www.petfinder.com and talk to rescues and shelters. Discuss your lifestyle, needs and work with an adoption counselor to find the best MATCH for your household.

NEVER buy a dog from the pet store, or classifieds, or websites. Those are the puppy mill puppies. Big trouble!

And many of these large breeds have severe health and behavior problems due to all the bad breeding going on.

You need to find the right individual dog. For example, a housebroken adult that is quiet and good with kids, or whatever the needs are.

See http://www.stoppuppymills.org

Also remember that caring for a dog can be expensive- food, medical treatment. Make sure your budget allows it.

And NEVER chain a dog outside, or leave a dog out unattended.

Go to a dog show and check the breed out. You will see more than one line (different pedigree, different part of the state and/or country) of adults and pups -6 mos and older.

Bullmastiff, one word, is a large breed but a well bred dog does not typically get fat. Some people mentioned as much as two hundred pounds. That is ridiculous. That’s either a poorly bred dog, an obese dog, or simply people over guesstimating a dogs weight. The later happens more often than you could imagine. I’ve had people guess that one of my skinniest (but tall) dogs weighed as much as 180 lbs when the dog might have weighed 140.

See the breed standard that was presented by two of the other answerers. Those numbers are much more accurate.

Only as big as a small horse, or pony.