rottweiler breeding

Question
i have female  she is about 100lbs. ihave freind who has male that is between 160lbs to180lbs how big can i expect the pups to get? once i breed them.

Answer
Size of the pups does not only depend on size of the parents but also on the grandparents and what each dog brings genetically. Please do be very cautious as your female is considerably smaller and could possible have problems delivering. You might want to be prepared for a possible c-section. Especially if this is your girl's first litter or if she is very young. My best guess, and it's only a guess is that your pups will range in size from the mother's size to the top side of the sire's side. Generally you will have some of both.
Cindi