well based on this chart they will.. I don't think no one could guarantee you how they are going to look or what they are going to weight but when i found this link I notices that is very close to true, because I bought princess when she was 8 weeks and she weighted 1.3 and she is now 4 pounds based on this link she was going to be 3.9 which is very close.. so
One of them right now weights 13 ounces and the other 13.5 ounces.
http://www.yorkiepassion.com/growthchart.htm
Let me know if you are interested. you could also come to my house and visit them when ever you want, so you see them grow.
thanks,
Angie