News! While preparing for a dance performance, I was putting on eyeliner and found out this great way to make your eyes look bigger. What's that? You want to hear about it? Well, okay.
Apply a light to medium coloured eyeshadow - not dark because this shrinks your eyes. Then, apply a line of eyeliner (use a softer shade) from the inside corner of your eye; extend this a little beyond your eye's outer corner to make it seem more elongated Then here's the trick - from the outer corner of your eye, apply a very short line of eyeliner. Don't let it get longer than a third of the way across. Blend the eyeliner on your lid and voila!
Hope this works for you - it did for me :D