Women with thin lips treat this subject differently.
Someone worries about his lips and carefully hides them behind a very light, almost white lipstick.
And someone is well aware of the structure of their lips, of their features and owns the techniques of turning thin lips into beautiful and (add a word that you like) sponges.
How to make lips thinner permanently without makeup?
Methods for the correction of thin lips
The image below shows the lines for adjusting thin lips.