Welcome to Yorkie Talk. There is a good chance the pup will take after the parents in size, but there is also a chance the pup will grow larger.
My boys are from the same parents, different litters. They grew larger than their parents and littermates. My boys are the oddballs of the bunch.
There is a chart that shows typical growth patterns, but my boys did not follow it. There is also a general rule of doubling the weight at 12 weeks to guess adult size. My boys did not follow the chart or the rule.