1. try picking out a frame that is not too thick, no matter how big the glasses are themselves.
2. avoid sunglasses with frames that touch your cheeks.
3. if you find them covering your eyebrows, switch them out for ones that don't.
4. when buying a new pair of oversized sunglasses, test out in the store the smiling technique. if it moves from your nose when you smile, then it's not right for you.
5. you have to know what shapes suit your face before going shopping. when it comes to oversized shades, there are round ones, squared and rectangular. 