50lbs
I will still love the breed but no, I wouldn't own one. I love any dogs I am that crazy but I wouldn't own one that is too too big. I am very scared of big dogs. The largest dog I have own is about 10kg (22lbs) which is a medium sized and with that I have a hard time walking him when he drags me around. Anything bigger than that is no no for me plus Siu Pao is 7 pounds now and when I carry him in his carrier bag in the mall, I feel my shoulder hurting so much after half an hour.
In short, I will still love the yorkie breed no matter how big they are but to own one that suits myself is another matter.