She is very pretty. Puppies like humans grow in fits and starts. I think she is probably a bit bigger than Javelin was at that age. He finished at about 50 pounds and 24" at the withers. Lily is much more dainty at about 37 pounds and 22 3/4".
She is very pretty. I don't think he is small but a good size. You just can't tell for sure as they grown at different rates. My boy was heavier s a pup but then he slowed down I think he is about 55 lbs now. He may get to 60 but I think that would be it.
I love the long legs - she will grow into them. As others say they grow at different times usually in spurts. My Asta was not as large as a puppy. As an adult he is 50 lbs. Regulates his own eating now - as a puppy he ate tons. Think Belle is a real cutie. Wish you much joy of her.
19.5 weeks = about 4.5 months. My boy Sam was 26 pounds at 4 months and 32 pounds at 5 months. So it sounds like Sam is just a little bit lighter than your girl's 30.7 at 4.5 months, but very close. Sam is about 50 to 51 pounds as an adult. My guess is that your girl will be between 50 and 55 pounds. Just a guess.