New question and answer

In earlier centuries, people used body parts to make measurements. They might take 50 steps and call the distance 50 feet or measure the height of a horse in hand spans. What were the advantages and disadvantages of these types of measurements?

Answer: 

When this was in use, people most likely got a wrong reading because of human growth disorder. The man with the biggest hands could have a different synopsis than the othere man with smaller hands.