Looks like your baby will definitely (obviously lol) be bigger than what the breeder stated - but of course, there guess is only that -
a guess 
Or I guess I should say, an estimate.
I have a 4 lb Yorkie. When I bought him they told me he would be in the 3.5 - 4 lb range. He hasn't gained hardly ANYTHING in a while - he will be 10 months in 2 days, so I think he's done