My yorkie is 11lbs and such a beautiful boy
He is the love of our lives!!
Trust me, health is what is most important, not size.
I can't imagine that a 5 lb yorkie looked big by any means...If the "5 lb" dog was significantly bigger than your 3.6lb dog, then it was probably larger than 5 lbs. I have a maltese who is right around 4lbs, and she is the tiniest little thing. My aunt has a 5.5 lb yorkie who looks very tiny as well...