My baby daughter has small ears. When she was born a karyotype test was administered due to concerns of Down Syndrome. 30 cells were examined and she passed the test. According to the lab, the test ruled out 10% mosaicism with 95% certainty. She seems to be functioning normally, meeting all of the milestones (heading head up, tracking with her eyes, and smiling) and there are no other signs of disorder. I have noticed that her ears are smaller than those of other babies. My wife and her sister both have small ears. She claims it runs in her family.