Thank you for your question and for providing photos to help assess your concerns. From your description, it sounds like you're looking to achieve a more balanced and symmetrical lower face, and you're considering masseter Botox and chin filler as potential treatments. Masseter Botox can indeed be effective for reducing the width of the lower face if you have hypertrophy (enlargement) of the masseter muscles. This treatment can slim the jawline and contribute to a more oval facial shape, which might help balance your facial proportions. Chin filler can enhance the projection and definition of the chin, contributing to improved facial harmony. When combined with masseter Botox, chin filler can help create a more balanced and aesthetically pleasing lower face. However, it's important to consider the following: Chubby Cheeks and Jowling: If you have concerns about chubby cheeks or potential jowling, it's crucial to approach these treatments carefully. While masseter Botox can slim the jawline, it might accentuate fullness in the cheeks if not balanced properly. Similarly, chin filler needs to be administered judiciously to avoid exacerbating any tendency towards jowling. Overall Facial Assessment: A comprehensive assessment by an experienced dermatologist or aesthetic physician is essential. They can evaluate your facial structure, skin quality, and specific concerns to recommend the most appropriate treatments. Alternative Treatments: Depending on your individual anatomy and goals, other treatments might also be worth considering. For instance, cheek fillers or buccal fat removal can address chubby cheeks, while skin tightening treatments can help with jowling. Given your concerns and desired outcomes, I would recommend scheduling a consultation with a board-certified dermatologist or facial plastic surgeon. They can provide a personalized treatment plan that addresses all aspects of your facial aesthetics.