What is the size of an Atlantic mackerel?

Atlantic mackerel typically grow to a length of 12 to 18 inches (30 to 46 centimeters) and can weigh between 1 to 3 pounds (0.5 to 1.4 kilograms). Some larger individuals may reach lengths of up to 24 inches (61 centimeters). They are characterized by their streamlined bodies and distinctive vertical stripes on their backs.