3. Using Your Fingers
If you don't have a sponge or stippling brush, you can always use your fingers (but make sure you first wash your hands thoroughly). Apply a small amount of concealer at the inner corner of your under eye and gently pat it down to the area where your eye circles are.
If you've applied concealer all the way down to your lash line, make sure you apply eyeliner and mascara on your eyelashes to make your eyes look bigger.