How old is Julia in Shakespeare's classic?

Romeo's AgeIn short, Shakespeare never says. So everything else is speculation. Many will assume that he is also 13 (Juliet's age), but there's no specific reason to believe that. He's likely older, at least by a few years. Whether that makes him 16 or 20 is subject to much debate.

In the original source material for Romeo and Juliet, by the way, Juliet was 18. Shakespeare changed it. So quotes about Romeo being too young yet to have a beard might even suggest that he was younger than her! And the next time somebody tries to explain an answer with "Well, back then...." stop them right there and ask "Back when? Back when Shakespeare wrote it, or back when the story is supposed to take place?" Because there's several hundred years difference.