User blog comment:The Milkman/Phantasy Philosophy: Elder Scrolls/@comment-3025184-20120918192920/@comment-3492791-20120919002642

I doubt that Elves "mature" slower, but i'm sure Argonians don't. The Argonian for the dark brotherhood (damn crazy fantasy names) said that he worked in the Dark Brotherhood since he hactched, and said he has always worked for Astrid. Thus is is fair to say that Astird (a human) is older than him, and he is full size.

However, if Skyrim is to be judge here, than every race except Nords are born full sized adults.