The image above illustrates the amount of space people generally need in order to feel comfortable when interacting with others in social situations. When dealing with a close friend or family member, this personal space is somewhere around 1.5 to 4 feet. In a public speaking situation, on the other hand, the need for personal space goes up to around 12 to 25 feet.
Learn more about how our need for personal space plays a role in our understanding of body language.
Image: Wikimedia Commons