What type of lip augmentation is required for a well defined Cupid's Bow lip? (photo)

Fillers to the lips would give you the look you want. I recommend a practitioner who uses cannulas to limit complications. I suggest a formal consultation.  Best, Dr. Emer.

Thank you for your picture.  Honestly, doing nothing is certainly an option as your lips already look great! That being said, any sort of surgery in this area can leave you with terrible scarring.  a modified lip lift can create definition along the cupids bow, however, that is reserved for very select patients.  In your case, an HA filler such as belotero/restylane silk/juvederm would do very well.  Best of luck.