Follow the list;
To be + number + years old;
I am 23 years old.
You are 16 years old.
Years old is optional. You can say;
I am 18 years old OR I am 18. Follow the other examples;
43 Ways to Say You Are Beautiful in English
English Ways to I LIKE IT
Do You Want to Speak English Faster?
CHAT ABBREVIATONS in English
Words To Use Instead Of VERY in English
Collocations in English - GO and HAVE;