I had Mandi into the vet for a check recently and she said that Mandi will probably be between 5-7 pounds full grown. Her comment was "the perfect size." She said it scares her that some yorkies are so small. She said it is really hard to treat them if they ever get sick--IV's and stuff. The little tiny ones are certainly adorable but with having 2 human children in addition to my dogs, I think it best to have a dog that isn't so minature. Gosh, I think 5 pounds is still tiny!! You know we'd love them if they were 20#'s it don't matter.