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Both of my boys are the biggest of their litters. They were tracking to be around 7 pounds, but they grew to 9+ pounds. :D They are very small to me, but I understand a preference for a 5 pound dog.

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My last yorkie was 5lb. ZoE's breeder said she would be on the upper limit at 6-7lbs. Well, she just kept growing! Shes an ounce shy of 10lbs. Not fat, a very fit, lithe pup, but she is big. To me, shes heavy to carry around for long periods of time, and popping her in a purse to run in a store kills my shoulder and has me looking for a cart/trolley immediately.

I'm used to her size now. She's almost 4 years old. And while she is sturdy and fit, in all honesty, there are times I wish she was a bit smaller, like my last yorkie.

A breeders estimate on adult size, is there best educated guess based on experience and knowing their lines, but it is a guess. So be prepared should he exceed expectations.

So, apparently he's 2 lbs at 6 weeks. Doing the "double at 6 weeks and double again" rule I found, he'd be 8 lbs I guess. But both his parents are 4.5-5 lbs. A puppy can grow to be almost double his parents' weight?

And yes, I really do want a smaller dog- 10 lbs would be too much for me.

Obviously health and temperament are most important, but meeting the breeder and a few of her dogs, I have no concerns there.

Yes, a Yorkie can grow much larger than the parents. The gene pool that determines size can go many generations back. Sometimes a tiny pops up in a litter, sometimes a large one pops up in a litter. My boys (brothers from different litters) are bigger than their parents and bigger than their littermates.

The only way to guarantee size is to buy an adult. Otherwise, as KazzyK wrote, it is an educated guess as to what size the puppy will mature to.

I should add, 2 pounds at 6 weeks is likely going to be a larger Yorkie.

Winnie is just barely 2# at 17 weeks...she has fluctuated the last three weeks between 1# 14 Oz and 2# . This past Friday she was 1#15 Oz. I'm hoping for a little growth spurt soon....but right now the vet suspects she will be between 3 & 5 # as an adult. I'm hoping for 5! It's really hard to tell what size they may be when they are grown....

Dex is almost 5lb at 20 weeks. The puppy growth chart calculator 'predicts' he'll be just under 7lbs. This is the first time we've ever had such a small dog so that's plenty tiny enough for me and honestly, I'd be good with a bit bigger! He's so energetic and playful we sometimes almost forget how fragile he is.

My little Tibbe is only 9" tall at the withers and 9" from the base of his neck to his tail but when I got him at age 9 mos., he weighed 5 lbs., having lived all his life confined to a crate with little proper nutrition or muscle development. Now he's 7.3 lbs.. at age 7 years and all hard muscle from stem to stern. He still seems very tiny to me - so little - but to lift the little tank is getting harder to do!!! hehe. His vets always list his body habitus as "ideal" but to me, he's just a little extra sturdy.

I have had two 3 lb. Yorkies that were just too tiny for their own good though they were sure easy to lift and travel with! One was my very first Yorkie and the only pup left when I went to look at the litter and I had no idea he would stay so small & the other was the sickly runt of a litter of otherwise normal-sized Yorkie pups and I took her on as a sort of rescue as a regular owner may not have been able to give her the kind of special care, constant vetting and time she needed to have her best life.

Knowing what I know now, I really prefer a larger Yorkie as they are less likely to get easily injured(which I always worried about with my two tinies) and seem to have far less medical issues than the tinies deliberately bred for their petite size. With a bigger Yorkie, you don't absolutely panic if he hears a cat outside and suddenly jumps directly off the couch, bypassing the doggie stairs - though my heart still just stops every time Tibbe does that. He's still far too little to be jumping directly off couches as he's still only 9" x 9" and I imagine his little joints aren't that substantial, even with the muscle support he's got now!

Interesting - I really like the idea of not having to worry as much. Thanks so much for your response. I also found out the one I sometimes look after and LOVE is 7.2 lbs - and he always seemed very sturdy and still incredibly light to hold. Thanks everyone!