Great Danes are the tallest dogs and can grow from 30 lbs as a puppy to 175 lbs as an adult.
Saint Bernard puppies can weigh 20-25 lbs but grow up to 180 lbs. They experience rapid growth.
Mastiff puppies typically weigh 5-15 lbs but adulthood can see them reach 230 lbs. Significant growth!
Newfoundland puppies weigh 10-15 lbs but hit 150 lbs in adulthood. They have the giant growth gene.
From 25 lbs as a pup, Great Pyrenees grow into 100-160 lb adults. Their growth rate is astronomical
Irish Wolfhound puppies of 20-35 lbs end up 100-180 lbs fully grown. They have one of the greatest size differences.
Bullmastiff puppies weigh 10-15 lbs but grow to 100-130 lbs as adults. Their growth is impressive.