Chewy was about 3 pounds at 5 months...he is probably about 4 1/2 now and he is 8 months... I hear they can grow up to two years from some people with yorkies...My vet seems to think he wont get much bigger though! I have no idea how big he will be but I love him no matter what. I exspected him to get to be 7 pounds but most people tell me he won't ever see 7 pounds. Any one have any idea???? I sure don't!