L'Oréal Paris Infaillible 36h Grip Micro Fine Liner 

For artistic precision: the Infaillible 36h Grip Micro-Fine Liner is the tool for ultra-fine eyeliner looks. The flexible brush tip allows for fine lines and full control with every stroke. In addition, the liquid formula delivers semi-permanent eyeliner that’s smudge-proof and water-resistant, lasting up to 36 hours. This means there are no limits to your creativity—from thin lines to more detailed, curved ones. With this eyeliner, you can refine a classic makeup look or discover entirely new ones.

Aqua / Water, Ammonium Acrylates Copolymer, Butylene Glycol, 1,2-Hexanediol, Beheneth-30, Phenoxyethanol, Hydroxyacetophenone, Caprylyl Glycol, Titanium Dioxide, Aminomethyl Propanol, Polyglyceryl-3 disiloxane dimethicone, citric acid, simethicone, bentonite, xanthan gum, sorbitan laurate, sorbitan palmitate, hydrogenated palm glycerides, sorbitan trioleate, sucrose palmitate, Tocopherol, [+/- May Contain: CI 77491, CI 77492 / Iron Oxides, CI 73360 / Red 30, CI 77266 [Nano] / Black 2, CI 77510 / Ferric Ammonium Ferrocyanide]. (F.I.L. Z292296/1).

For micro-fine eyeliner lines: Look straight into the mirror and use the Micro-Fine Eyeliner to place a dot at the very last lash on the outer corner of your eye. Then place additional dots at small intervals along the lash line until you reach the inner corner of your eye. Next, connect the dots. Done.