When you pick sunglasses, avoid lens shapes that mimic your natural face shape. For example, women with round faces should avoid circular silhouettes. Instead, try squared looks or aviators to create the appearance of angles. If you have an oblong face or a strong square jawline, round or oval shades can help soften your angles. Those with an oval face shape can pull off almost any frame, but lenses that are distinctly wider than long can help keep things proportional. Squared frames should complement the slender chin of triangular or heart-shaped faces, while oversized styles should be avoided.