What size do the fish halibut grow up to be?

The halibut (Hippoglossus hippoglossus) is a large, flatfish found in the northern Pacific and Atlantic Oceans. It is one of the largest flatfish in the world, with some individuals reaching lengths of up to 8 feet (2.4 meters) and weights of over 7 feet (2.1 meters). The average size of a halibut is between 2 and 4 feet (0.6 and 1.2 meters) long and weighs between 20 and 40 pounds (9 and 18 kilograms).