If you have a round face then this sunglasses guide is for you! Much like square faced people, round faces need to be balanced out with the opposite shape so rectangular or square framed glasses are often quite flattering. This doesn't have to mean rigid shapes, as long as there is a straight line (usually across the top) then that should be enough.
Kate Bosworth and Kirsten Dunst both have round faces and know that wayfarer styles suit them. These retro shades have experience a revival lately and are available at a range of price points. See below for some of the best styles for round faces.