Don't go overboard with bright colored liners. A thin, clean line is perfect for small eyelids. Cosio suggests lining the inner rim of the eye or applying the liner on the upper edge from the middle to the outer corner, which makes the eye look bigger.
If you already have larger eyes, you can make the line a bit thicker and line the entire upper lash line.
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Velvety pencil eyeliner in Kitty, Nars, $20; at saksfifthavenue.com