This image by the Curiosity Mars rover is not exactly your typical selfie.
It is made up of a bunch of images taken by the rover during January 2015 by the Mars Hand Lens Imager. This (MAHLI) camera is at the end of the robot’s arm.
For a sense of scale the rover’s wheels are about 20 inches diameter and 16 inches wide.
Check the annotated image below for more information on the surroundings. Also if you really want to see some detail click this very large image, 36mb, at NASA.