I think shade 606 is the most popular (and with reason). This is so good but it is on the pricier end but lasts a while. I'm using limitless brown and I use it everyday for 7 months and its only halfway done
ARTIST COLOR PENCIL Brow, Eye & Lip Liner
This is ALWAYS sold out and it infuriates me that I can't find this shade. Nonetheless, it's cheap, affordable, and a fan fav!
Kiko Milano lip liner shade 34
I love soft nude and this literally NEVER moves. It stays in place. Get it before it sells out
Lip Contour Stain Soft Nude
I didn't actually think I would like this one but it's super good. I love the formula and it is so cute as well.
This isn't a lip liner but I wanted to share this masterpiece of a lip product because this is by far, one of my top favorites. It is also on the cheaper side, being NYX
Shop Long-Lasting Lip Stains & Tints | NYX Professional Makeup
Shockingly good and it's on the cheaper side as well. Does smudge a bit and reapplication is necessary but a good alternative
Lifter Liner Lip Liner Makeup with Hyaluronic Acid
I liked this one a lot. Very underrated for some reason.
Lip Sketch Hydrating Crayon - Lipstick Lip Liner
Get them all. Literally. Pair them with the lipsticks and u have yourself a lip combo that many people will be complimenting you on (based off experience)