how tall do penguins get each year?

Answer 1

Once penguins have fledged, the young birds and adults are the same height. There is some sexual dimorphism in some species. In rockhopper penguins, the male is slightly larger than the female. Apart from that, the tallest penguins are the emperors while the little penguins are the shortest.

Answer 2

the young grow to the hight of the adults

every year
always the same height
very boring

its not like humans who all have sons taller than their fathers