Yep Chis can be born much larger than most think. This particular breeder had a bitch that only conceived one pup and she was 6 ounces at birth! She only grew to about 3.5 pounds full grown though LOL.
Here is a picture for comparison. This is Ryleigh and a pup from another litter who is 3 weeks, Ryleigh is 6. He was 5.6 ounces at birth and she was 3.75. :D
http://i196.photobucket.com/albums/a..._Sasha_003.jpg