My puppy was 2 pounds 10 ounces at 13 weeks. So they are
estimating that she will be 5-6 pounds all grown up. I guess the rule of thumb is to double the 12 week weight, but it really isn't an exact science. If my puppy ended up being 20 pounds, I'd love her just as much
Your breeder should be able to give you an
estimate on full grown weight, I think