Nobel Prize laureate Enrico Fermi was among the greatest physicists. How tall was he?
In the book, "Remembering Fermi" his friend and scientific collaborator Emilio Segré was quoted as saying, "You know, Fermi is just a little guy." It is observed in the book that Segré was barely 5 feet 7 inches himself. In photographs of both Segré and Fermi standing together (such photos are easily found on the Internet) it is readily apparent that Segré stands about 3 inches taller than Fermi. Even accounting for shoes, the height difference is marked. Hence, 5 feet 4 inches tall for Fermi is about right.
Likewise, it is impossible to find a group photo with Fermi in it where Fermi is not the shortest person in the photo. So, it can be confidently stated that Fermi was only 5 feet 4 inches tall.