Wrap-around Chin Implant Projection?

Depending on the surgeon's goal and the particular implant and its placement, the implant can provide a variable degree of FORWARD projection as well as VERTICAL HEIGHT to the chin (=front of the jaw).
Among the problems encountered with simple onlay implants (encapsulation, movement, warping, rotation, erosion of the underlying bone, exposure etc) has been that on occasion they were just too short causing a depression on the sides between where the implants ended and the anterior edge of the masseter, the great chewing muscle began. The wrap-around implants were designed to be very long in an effort to get around these side dips. BUT - they are NOT supposed to increase any volume to the sides, on the contrary, their job is NOT call attention to the fact you have an implant by doing away with the depressions.
Hope this was helpful.

There are many styles and sizes of chin implants.  Visit with a surgeon with significant experience and try a number of them on as trials and have proper measurements made of your face. Your surgeon should be able to tell you what to expect.