A whale shark is enormous: most adults are about 18–32 feet (5.5–9.8 meters) long, and the very largest reliably measured individuals reach around 60–62 feet (about 18–19 meters).

Quick Scoop

  • The whale shark is the largest fish in the world, bigger than any known shark species alive today.
  • Typical adults are roughly the size of a city bus, with many measuring around 30–40 feet (9–12 meters) in length.
  • The heaviest individuals can weigh around 20–25 tons, similar to a small humpback whale.

How That Size Compares

  • Even at their maximum of about 18–19 meters, whale sharks are still shorter than blue whales, which can grow over 30 meters.
  • They are, however, much larger than great white sharks, which top out at about 6–7 meters.

Fun Size Details

  • Newborn whale sharks are only about 0.5–0.6 meters long, tiny compared with their future adult size.
  • Females may grow larger than males, with some estimates suggesting big females commonly reach 12–14.5 meters.

TL;DR: A whale shark is usually around bus-sized (18–32 ft / 5.5–9.8 m), but the biggest confirmed ones are about 60–62 ft (18–19 m) long and weigh over 20 tons.

Information gathered from public forums or data available on the internet and portrayed here.