Japanese phrase
私は___歳です。 watashi wa ___ sai de su
Meaning
I am ___ years old.
When to use it
States the speaker's age. It is a simple polite phrase for everyday introductions.
Example dialogue
おいくつですか？ o i ku tsu de su ka
How old are you?
私は二十歳です。 watashi wa ni jū sai de su
I am twenty years old.