How to decrease the size of a large/wide lower jaw and chin? (Photo)

Pam, This is the kind of procedure I do for women from around the world each week.  We go through the inside of your mouth to make the jaw more v-shaped, narrower, contoured, and attractive to the extent you wish.  When botox is not the answer, the bone surgery works.

Implants can strengthen the jawline and create a more balanced facial silhouette by augmenting the mandibular body, angle, and ramus. A wide variety of patients can benefit from this procedure, including those with normal, deficient, or surgically altered anatomy.
 

Thank you for the question. 
Jaw augmentation can be achieved with a chin implant (sizes vary) or with injectable fillers (temporary). Botox can reduce the size of the masseter muscles, creating a slimmer jawline with a decrease in volume to the area. You can ask your plastic surgeon for more surgical and non-surgical options at your initial consultation. If you are looking to cut down the bone of the jaw, which is not a highly recommended procedure, then look for an experienced, Board-certified surgeon who specializes in the procedures you are seeking. It is advisable to seek a plastic surgeon who implements advanced photo software system in their clinic so you can see a 3D image of what you would potentially look like after the above mentioned procedures. 
Hope this helps!