I hope you mean 1.7 POUNDS
Chloe was about 2 pounds at 10 weeks I think and she is 5 pounds now.
Armani was about 3 pounds at 10 weeks and he is 5.5 pounds now.
Also, genetics do play a big part- some dogs grow faster at the beginning and others seem to have a "spurt" later- you can usually get a good idea by looking at the parents, and their parents, and their parents, etc.