A medium hairstyle that best suits a round face would be one that is swept back away from the face while creating more fullness and height at the crown. Perfect role models for this type of style are Christina Ricci and Kate Winslet. For a heart shaped face, a chin length cut can do wonders while long hair should be avoided altogether. A similar style is also recommended for those with square faces. The names of some famous heart-shaped faces include Claudia Schiffer and Michelle Pfeiffer and those of some square-faced stars include Demi Moore and Sandra Bullock.
Whichever medium hairstyle you choose for your face type, it is important to keep in mind that your personality is just as important as your face when it comes to making this decision.