Most of my puppies will likely fall into the 50-80 pound range with the larger boys possibly being able to reach close to 100 lbs. It is very hard to determine what size a puppy will be when they are younger than 7 weeks of age. After they reach that age, it is a little easier to cast a judgment as to what size they will be full grown. We still can’t be for sure though and so that is why we give a range.