According to classical sources, Narcissus was indeed known for his exceptional beauty. While the specific age of Narcissus isn't universally agreed upon in all accounts, he is consistently depicted as a strikingly handsome young man.

Here are some points gathered from reputable sources:

• Appearance: Narcissus was famed for his beauty. He was so beautiful that he attracted the attention of many admirers, both male and female.
• Age: Though the precise age varies, he is generally portrayed as a young man, typically in his late teens or early twenties.

For further reading, you might find the following resource helpful:

• Encyclopædia Britannica - Narcissus