Lliquid eyeliner or pencil eyeliner. With liquid you glide the eyeliner just above the lash line and can make it as thick or thin as you would like. With a pencil you can apply it above the lashline or on the lashline and if you want to make it look more smooth and natural use a smudger to smudge it .
liquid eyeliner is better to apply on the top (:
liquid eyeline but you need a steady hand :)
oooh. i love liquid eyelinerrrrr :)