When applying your eyeliner, you should use a more natural color like brown or blonde. This will naturally enhance your eyes, without looking like you have too much makeup on. Only line the outer side of your eye with the brown or other color pencil, and then use a white or tan liner for the inside of your eye. This will make them look naturally larger, without black lines drawn on your eyes.

Your eye shadow also can change the size of your eyes, especially when you use certain colors. Darker colors can sometimes draw attention away from the eyes, since it can make the eyelids look bigger than they naturally are. Try for light and shimmer colors, so your eyes will stand out without any distractions. You can experiment with different color combinations between your shadows and liners, and it should be pretty each to find a combination that fits your style.