Penguin sizes range from the largest penguin species, which can be as tall as 45 inches and weigh as much as 60 to 90 pounds, to the smallest penguin, which only reaches 12 inches in height and weighs 2 to 3 pounds. There are varying species in between at differing heights and weights.
The largest species of penguin, the Emperor penguin, averages 66 pounds and a height of 3.8 feet, and lives in Antarctica. The second-largest penguin, the King penguin, looks similar to the Emperor penguin but is found in the sub-Antarctic belt rather than in Antarctica. The male King penguin averages 35 pounds and 37 inches in height.
Most penguins are much smaller than the Emperor penguin and King penguin. The Little Blue penguin lives in New Zealand and Australia. It stands only 10 to 12 inches tall and weighs only 2 or 3 pounds. Other small species of penguin include the Magellanic penguin of Chile and Argentina, weighing 7 to 15 pounds and standing 14 to 22 inches tall, and the Rockhopper penguin, which is 18 to 23 inches tall and weighs 4.5 to 8 pounds. The Humboldt penguin lives in Peru and Chile, weighs 6 to 11 pounds, and stands 18 to 25 inches tall. The Galapagos penguin, which lives on the Galapagos Islands, is 21 inches tall and weighs just 5 or 6 pounds.
More medium-sized penguins include the Gentoo penguin, which is 30 to 35 inches tall and weighs 10 to 14 pounds, and the Royal penguin of New Zealand, which weighs 12 pounds and stands 26 inches tall.