Hack #1
Peppermint oil makes your lips bigger and works as a natural lip plumper. I would suggest to put some peppermint oil drops in your lip gloss and the combination will work just as a lip plumper whenever you decide to put it on your lips.
Hack #2
Hack #3
Massage constantly your lips to stimulate the blood flow on them, and you will notice an increase in size on your lips by time. Also, biting them often helps in same way.
Hack #4
Avoid dark lipsticks. Lipstick colors such as velvet, dark purple, dark brown, plum etc can really make your lips look even smaller, so never try to use them if your purpose is to increase your lips size. And, yes overlining your lips still doesn't help on this case.
Hack #5
Exfoliate your lips gently. This hack will help making your lips look immensely bigger right away. Also, it gets your blood flow and removes your dead cells. Just pay attention to be gentle while exfoliating your lips and also don't do it more than 3 times per week, because it can risk making your lips drier. Use a toothbrush as a natural exfoliator and move it in circular motion on your lips.
Hack #6
Use lip liner. You should find a lip liner color that matches your skin tone perfectly, or a shade which is a bit darker or pinky. Lip liner definitely helps on creating that 3D effect on your lips. Apply the lip liner carefully on the edges of your lips and you can overline it just in the center of your lips to give the look of pumper lips.
Try these hacks and let us know your results and opinions on the comments section below.