What procedure would best fit me?

The chin itself is not actually long, but it is the way the muscle wraps around your chin that creates that hanging appearance when you smile. A reduction in the chin would most likely make this worse. My recommendation would be for a small implant or a genioplasty to add length to the chin. This would fill in some of the space and allow the muscle to drape over in a more natural way, reducing or eliminating the overhang. Our office provides virtual or in-person consultations if you would like to discuss options further!

Hello, hope you are well. Chin reduction is traditionally performed by sculpting the bone that underlies the soft tissue. In your case, it seems that the problem is only occurring when you're smiling. I think you should start with a simple trial of neurotoxin (e.g. Botox) to the chin muscles. This could be a relatively straightforward solution for your concern.
Best,Dr. Tower

Hi Honest! This looks like it might be a matter of a hyperactive mentalis muscle, since you say it shows up when you smile. I would try doing aggressive botox to this area first to see how much you can decrease the activity from that alone before trying surgery.