Hi, thank you for your question. Based on your photo, it seems like you already have fullness and volume in the lips. So the amount that you would want to treat the lips with, really depends on you and what you are trying to achieve. If you are looking to make the lips look more hydrated, a filler such as Vobella, or Restylane Refyne would be a good choice as they aren't too thick and won't overfill your lips. I would suggest 1cc of either one total. If you are looking for more fullness in the lips, fillers such as Juvederm or Restylane are thicker and will be able to achieve that look. Again, I would avoid treating with more than 1cc of either one. Its best to consult with an experienced injector based on your needs and desired outcome. All the best, -Melody PAC