To "ROUGHLY" Estimate a Shih Tzu Puppies Adult Weight, See Chart Below:
For GIRL: 8 weeks old weight x 3.6 = adult weight, so if the girl weight 2 lbs at 8 weeks old, she should be around
7.2 Lbs fully grown. Usually female Shih Tzu dog Size fully grown at around 8-9 months old.
For BOY: 8 weeks old weight x 4.0 = adult weight, so if the boy weight 2 lbs at 8 weeks old, he should be around
8.0 Lbs fully grown. This is only roughly estimate, the most important is the father and mother weight, Puppy's
Grown Up Quality and Size are usually like parents.