This is a custom phone case I made for my wife's phone some years ago. She had an add-on battery that extended the life of her phone considerably, and so she couldn't find a case, because the battery also made the phone much larger. She wanted a case because she doesn't have pockets like many women do, and it was not uncommon for her to drop the phone as a result.
I designed and 3D printed this, including a little rubber-molded button that pushes through to the underlying phone button. It took me several iterations to get it right, and the end result was kind of striking. People would often comment on it.

And the back, with the camera cutout and a loop for the lanyard.
