[FlDebra]

It is not just the male's size, but his line's sizes. Since you already said that "His father was small and his mom was larger (within the standard) " and "She comes from a line of females who have had no problems at all giving birth. His lines are much the same and his mother had clean whelps. " -- things are looking good so far. Now look to the litters that his mother and father produced. Were most of them within standard as adults? That is an important thing when looking specifically at size. His size is not that much larger than your girl. So, I do not see a danger to health if other puppies in litters produced by his parents (and maybe even look at grandparents) were not over standard as adults or overly large at birth. It is fine for them to wind up like him @ 6 pounds as an adult. The fact that the mother and father were responsible for all clean, healthy whelps says they are not throwing huge puppies that could endanger the mom. So you are probably safe on size. Just ask the breeder specifically about other puppies sizes from the mom & father of both your dam and sire. That will give you a good idea.

I won't go in to anything else as you only asked about size. I do want to congratulate you on going about this the right way -- research, research, mentoring, and investigation! Then testing, evaluation, and more mentoring! Always learning! Always on the lookout for more input!