well its not always accurate but double her 12 week weight and there it is mine was 1.7 at 16 weeks
so i get she should be 3lbs or 3 1/2lbs full growm but hopefully she weighs a litttle more i wanted to have her have pups once i want a big yorkie family but if she doesnt gain weight i wont risk her life but im hoping she gains
you are probably looking at 3 1/2-4lbs possibly 4 1/2 i wish mine was the weight of your pup congrats