You should consider three main points when choosing an eyeglass frame for your face shape, according to The Vision Council:
Eyewear should repeat your personal best feature (such as a blue frame to match blue eyes).
The frame shape should contrast with your face shape.
The frame size should be in scale with your face size.
Also, while most faces are a combination of shapes and angles, there are seven basic face shapes: round, oval, oblong, base-down triangle, base-up triangle, diamond and square.Here is a further description of these face shapes and which types of frames work best for each, according to The Vision Council. A good optician can help you use these guidelines to choose your new eyeglasses.