What do they look like?
She has long straight black hair.
What do they look like?
He had a beard and a moustache
What do they look like?
She's slim / She's thin
What do they look like?
She has long curly red hair
What do they look like?
They are tall and she is short.
What do they look like?
He's bald
What do they look like?
He's overweight / He's fat.
What do they look like?
She has short straight brown hair
What do they look like?
He's very tall.