King penguins are usually 70 centimeters (0.7 meters/30 inches) tall and weigh 9 to 15 kilograms (20 to 30 pounds). They have silvery-grey backs, black heads, and bright orange patches of feathers on the sides of their necks. While they look like emperor penguins, they are different in the fact that king penguins have longer beaks, orange coloration on their chest, and are thinner than the emperor penguin. Males and females of the species look the same.