Bronxie is a year old and she weighs 10 pds. when we got her she only weigh 2.5 pds and at the time she was 15 weeks. Brooklyn weighs 3.5 he is 8 mths now and we got him when he was 12 weeks he only barely weigh 2pds. Our newest addition is a yorkiepoo(Queens) she is 12 weeks tomorrow and she weighs 2pds already. I think it's hard to predict.
I love my fatty Bronxie that is what I call her but it's getting hard to pick her up with one hand now and she loves to be picked up just like a baby.
I wish Brooklyn was bigger though I don't like worrying about him getting hurt all the time. The yorkie growth chart has been pretty accurate with Brooklyn but not with Bronxie.