Sometimes it can be hard to find a horizontal crop of a vertical image. In this case the horizontal crop helps to add mystery by removing the eyes out of the image. This impacts the viewer in a different way by changing the focal point of the image to something other than the eyes. It puts more emphasis on the ring, and lets the viewer investigate the subject rather than letting their attention go straight to the eyes.
Typically I like to frame the subject in-camera but in this case I granted myself a little creative freedom. It was inspired by a painting series that Michelle created for her Thesis project in her last semester at Texas State.