See before and after photos of one of the Dr. Lamperti's chin implant patients in which an extra-large chin implant was used.
I most typically use either a medium or large chin implant as one of those two sizes typically provides a nice natural improvement in chin projection without looking overdone.
In the most recent patient to be featured in my chin augmentation before and after gallery you can see how an extra-large chin implant was a better option given how recessed the patient's chin was. You can see the chin implant before and after photos here.