[JadeD]

Welcome to Yorkie talk!
I am glad you were able to take the puppy as they could not keep him. How luck for him. That is about the size of my puppies at 12 weeks. I am expecting mine to be about 8-9 lbs. The dad of my puppies was only 4 1/2 lbs, but the mom was 10 lbs. I do know the grandparents on the dad's side and the grandmother is 7 lbs and the grandfather is about 9 lbs. My puppy looks like the grandfather right now, so I am hoping he will look just like him as an adult. Mine are 5 months old and my smaller puppy is about 6 1/2 lbs and the larger one is a bit over 7.

There are adult weight estimators online that you put in the age and weight and breed of a puppy and it will give you an adult weight, but these are not always correct of course.