My sister

I have a sister. Her name is Maria. she is 34 years old. she is manager. Maria is slim she has black long hear. she is very nice and very pretty.

My sister

I have a sister. Her name is Maria. She is 34 years old. She is a manager. Maria is slim and she has long, black hair. She is very nice and very pretty.

My sister

I have a sister. Her name is Maria. She is 34 years old. She is a manager. Maria is slim, she has black, long hair. She is very nice and very pretty.

Good job! :)

My sister

I have a sister. Her name is Maria. She is 34 years old. She is a manager. Maria is slim and she has long black hair. She is very nice and very pretty.

In regard to adjective order, size comes before color.