This is the size of the sequoia compared to a human. What you have in front of you now is the largest living creature on Earth and the largest giant in it.. the giant sequoia tree. Sequoia is considered the largest living creature in the world and the longest-lived trees, as some of them exceed 88 meters in height, and some of them are estimated to be more than nine meters in diameter. The largest sequoia tree on Earth is located in the public park in California, Sequoia Park, called General Sherman, and its volume is estimated at about 1487 cubic meters, which is equivalent to half the size of an Olympic swimming pool, and its age is estimated at about 2000 years.