Ответ:

Здесь всё зависит от тебя, как выглядишь ты, но вот пример:

My name is ( Твоё имя)

I'm 12 years old now

I am really really beautiful

I'm not small, I am pretty tall

I am pretty well-built

I have got short and fair hair

My eyes are blue and narrow

My nose is small and pointed