Absolutely, he's going to be what he'll be; this year even! I have no idea what mine will weigh. According to this growth chart, he's going to weigh 4 pounds.
Yorkshire Terrier Information Center | Yorkie Growth Chart
According to the doubling game at 13 weeks, he's going to weigh 5-6 lbs.
His parents are in the 4 to under 5 pound range. Still haven't chatted with a single person who's parents were within ounces and the father being larger. I don't know what a larger father produces. Everyone breeds a smaller and sometimes super small male to female in the English speaking countries to get smaller puppies. I just picked a number compared to the charts and what I saw happen to my toy poodle...it was a guess for fun. Have no idea what the reality will be. When I talked to my vet about it, as stated in another thread, he said not to feed him much...It's good to ask to find out if people let their dogs graze, causing them to be larger, as per my vet. I don't need an overweight dog. But from asking all of these questions, I can observe and make better choices for my dog at 13 weeks, he still has his life ahead of him and I want him to make it to the 12-15 year mark.
Hey, if you're relaxed about it no sweat. Why have a growth chart or a scale? Obviously, I'm not the only one curious about it. I'm curious, gathering information because I'm interested in it. I don't have anyone to discuss this with. Why not ask others that have experience? In my experience, sometimes I have to ask a few different ways to get the answers I'm looking for. Not sure why the need to question the question. But if it's alright for my dog to be 4-5 pounds, I'd like to feed him into that direction. I have several herniated discs and really want to carry him around. I want him to be healthy but the reason I chose this breed was for their small size. Hope this helps to see why my obsession. Oh, and I bought a toy poodle for this same reason, to tote around. Love her dearly, she's just too big for me to tote around. Yorkies have anxiety separation, I really want him with me and like I said, if I can see what other Yorkies are weighing at 12-13 weeks and they also fell into the 4-5 pound weight category, with similar parents, then I can go ahead and feed him similarly or watch that at certain age he needs to be gaining more. I really want a healthy dog.