THIN LIPS Make thin lips look fuller and accentuate their shape by outlining just outside their natural edge with a lip liner. Brush on a lip color inside the line you have drawn. Avoid using very matte colors as these can make lips look even thinner; slightly glossy colors will make lips look fuller. 

Uneven Lips Balance an uneven top lip by outlining just outside the thinner half of the lip and along the natural edge of the fuller half using a lip liner. Check that the line is even, then outline the lower lip. Brush on a lip color inside the line. II lips still look uneven, add more color to the thinner half of the lip. 

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SHAPELESS LIPS Give lips more definition by outlining the top lip with a lip liner lo emphasize the "m" in the middle and so create more of a cupid's bow. Outline just outside the natural edge of the lower lip to make it look fuller. Brush on a strong lip color to help give the lips even more definition. 

FULL LIPS Make full lips appear thinner by lightly covering them with foundation to help blur the edges. Using a lip liner, outline lips just inside their natural edge, then brush on a lip color, being careful not lo go outside the line. Avoid pearly or glossy colors as these will make the lips look even fuller. 

UNEVEN COLOR Balance different-colored lips by covering both with a little foundation. Outline lips with a lip liner, then brush a darker shade ol your chosen lip color onto the hp that looks lighter and a lighter shade onto the one that looks darker. Purse the lips gently together to even out the color more.

(source: Dk publishing Inc - Classic Makeup and Beauty - Mary Quant)