Depends on the pedigrees and what they will throw. My Radar is up on leg but he's just right at 6 pounds fined boned and was bred to my champion bitch that was 5 1/2 pounds short on leg, cobby body and she threw a small boned 5 pound bitch and then a bigger boned 7 1/2 pound bitch so somewhere in his or her pedigree she had a larger yorkie that was bred within her lines and both parents of the puppies are great representive of the breed and bred with quality! Both the sire and dam of these puppies went on to be #5 in the US in 08 and then the bitch was the #1 yorkie bitch in breed in 05 so the answer to your question is a good show quality yorkie can throw a yorkie on the larger size
Donna Bird