What does 'ones' refer to?

You are still left with your own face and figure, and you cannot trade those in for different ones.

In the sentence, what does the word 'ones' refer to? Does it refer to 'faces and figures' or 'face and figure'?

In your example

ones

refers to "face and figure"

You are still left with your own face and figure, and you cannot trade those in for a different face and figure.