The universe is vast beyond our full comprehension, and its size is one of the most intriguing questions in cosmology. As of current understanding, the observable universe extends about 93 billion light-years in diameter. This means that light from the farthest objects we can see has traveled 93 billion light-years to reach us.

However, the universe itself is likely much larger than the observable portion. The entire universe could be infinite, or it might be finite but vastly larger than the part we can see. The true extent of the universe is still a major topic of research and exploration in cosmology.