All penguins in Club Penguin Rewritten have ID numbers, such as P123456. The ID number signifies how old a penguin is in Club Penguin Rewritten. For example, if a penguin's ID was P1234 then they would be the 1234th penguin created on Club Penguin Rewritten. Your ID is shown as your username before the username you picked gets accepted by the Club Penguin Rewrittenteam. If it is not accepted, it will stay like that forever or until you contact them for a new name.
The average height of a penguin is 42 inches.
Penguins have a variety of colors available for them to choose from.