hey! welcome to yorkie talk...
I have two girls that are 10.5 weeks old... They are pure yorkshire terriers. At this age, they are about 2lbs 10oz to 3lbs. Their parents are 4lbs (father) and 6lbs (mother). So we are guessing they will be around 5lbs
Do you know the weight of the parents?? Youve got a tiny one
Any pictures?