Caption: Researchers discovered the fossilized footprints of the largest ancient human.

At 5-foot-5, 100-pounds, the newly discovered prehumen species wasn’t going to be taking the place of LeBron James on the Cleveland Cavaliers anytime soon.

While “S1” isn’t going to be mistaken for a basketball player in 2016, researchers believe he is the tallest known member of the prehumen species best known for the fossil skeleton.

According to a article, scientists have pieced together what they believe the ancient human’s height and weight are using footprints left behind approximately 3.7 million years ago and reaching a stature that no other member of the human family tree matched for at least another 1.5 million years.

The 13 footprints were left as impressions in volcanic ash that later hardened into rock and excavated in northern Tanzania in 2015. The footprints were averaging slightly over 10 inches long, suggesting that S1 might be a male.

The footprints were found at a site called Laetoli, which is perhaps best known as a hotbed for finding fossilized footprint including another set of smaller footprints left behind by other A. afarensis individuals which came to light in the 1970’s.

Researchers believe that the creature was at least 8 inches taller than other individuals that have been discovered at the site and at least 3 inches taller than another ancient human species previously found in Ethiopia.

One of the explanations for the size of the footprints is that it may suggest that A. afarensis males were bigger than females, with a larger gap in size between the two genders than what is seen in modern human beings.

According to the study researchers, a large disparity between males and females may suggest that A. afarensis had a gorilla-like social arrangement of one dominant male with a group of females and their offspring.

The study was published in eLife.

Authors include Giorgio Manzi of Sapienza University in Rome, Marco Cherin of the University of Perugia in Italy and others.