Liquid, pencil, marker, crayon, or gel? Find the right product and technique for you with the help of Los Angeles–based celebrity makeup pro Robyn Cosio.

You Want... Go For Pro Tip We Like
» A soft, natural line A pencil liner. Easy to control, the blendable formula is forgiving of mistakes. Make tiny dots between the hairs along the lash lines for subtle definition. Rimmel Scandaleyes Waterproof Kohl Kajal Eyeliner ($4; mass retailers)
» A wearable, daytime-appropriate line Gel liner. It really lasts, but can be diffused by blending. After dipping the brush into the pot, wipe off excess liner on a tissue before applying. Maybelline New York Eye Studio Lasting Drama Gel Eyeliner ($10; mass retailers)
» A strong, defined line One of the latest marker liners. Their fine, stiff tip can be used for thin and thick lines. Hold the marker on its side as close as possible to your lashes, then sweep outward. Smashbox Love Me Paint Pen Eye Liner ($24;
» A bold razor-sharp line with a wet-looking finish Liquid liner. Ideal for dramatic looks, the fine brush creates clean definition. Starting at the inner corner, draw short strokes in three small sections, not one long line. Almay Liquid Eyeliner ($7; mass retailers)
» A heavy, smoky line A fat, creamy crayon. The tip is wide, so you'll get a thicker, more intense effect. Turn the crayon on its side for a delicate line, or smudge the wide part for a night-out look. Sephora Collection Jumbo Liner 12HR Wear Waterproof ($14;

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