Hello In most cases the sire is bigger than the damn, If it was the other way around would the pups take more characteristics of the mother or father. Asking because in December I will be welcoming a DDB pup into the family and in my case the mother is larger than the father. The mom is 28 inches tall and weighs almost 140 and the father is 26 inches tall and weighs about 135. my pup will a male pup. thank you for the help.