This is where the pros come in, as they're the ones who work with lip liner on clients every day and have a wellspring of knowledge when it comes to what neutral shades work best on each skin tone. Most of you are probably already makeup-savvy enough to know that someone with fair or light skin wouldn't want to wear the same shades as someone with a tan or dark complexion, but even still, it can be super-helpful to hear from experts because you can count on their recommendations being some of the best out there. A lot of people get confused about their purpose because they believe lip liners only have one purpose: pout plumping. Believe us when we say that they do have this power - if you want to enhance the size and shape of your lips, grab a lip liner in a shade as close to your lips as possible (don't worry, we've got that covered in here), and draw the line slightly over the edges of your natural lip line. This creates the illusion of fuller lips.