Another day, another thing to contour. Will it ever end? No. Probably not. I guess lip contouring sounds slightly less ridiculous than all the other contouring options as of late (hair contouring, cleavage contouring, elbow contouring, etc.), and like, it can really work in your favor. If you weren't blessed with full lips, you were most likely born in the wrong decade, but no biggie because makeup is here to help you assimilate into the current culture's standard of beauty — the one singlehandedly set by the Kardashians. Thanks, assholes!
Here's how tf to contour your lips. Because at least it's less painful than injections.
First, put on some lip balm. Then, grab a lip liner that matches your natural lip color like MAC Lip Pencil Naked Liner or something else IDK, you'll have to go to the store and test it. If you're going for a natural/anti-clown look though, it's important to match this up perfectly. Then line just slightly outside of your natural lip line, focusing on the middle for a more natural effect. Dab a bit of white eyeshadow or highlighter on the middle of your upper and lower lip, and top it all off with some more lip balm.
Find a liner that's a few shades darker than your natural lip color (Bobbi Brown's Lip Pencil in Nude works on a lot of skin tones, so give that one a whirl) and apply it slightly outside of your natural lip edge, just like before. Then draw three lines on the bottom of your lip, following your lip's curvature, and two lines on your top lip. Shade the edges of your lips, and blend everything together with your finger or a lip brush. Finish it off with a nude lipstick like MAC's Creme D'nude.
This is getting redundant, but I'm going to say it anyway: Get a lip liner that's one or two shades darker than the lip color you will be applying. So like, if you want red lips find 1) a red lipstick and 2) a dark red lip liner. Then, outline the edges of your lips with the dark liner and blend the line inward with your finger. Top it all off with the lipstick. For extra volume, dap clear gloss on the center of your bottom and upper lip.