Oval faces, characterized by foreheads that are slightly broader than your cheekbones, with rounded chins and no harsh lines, look good with almost any style of eyeglasses or sunglasses. The only frames you may want to avoid are those with dramatic features that can throw off your naturally-balanced proportions.
Round faces are roughly the same width and length, with full cheeks, rounded chins and are essentially angle-free. To add dimension and perceived length, try geometric and rectangular frames that hit just above your cheekbones, but steer clear of circular frames that will emphasize your cheeks.
Diamond-shaped faces are the most rare face shape, but work with almost any style. Since diamond-shaped faces have highly pronounced cheekbones and a narrow jawline, it's best to stay away from narrow, thin or angular glasses. Try eyewear with curves to soften angles or rimless and oval frames to broaden the upper face.
No matter the shape of your face, there's a frame out there that will highlight every one of your amazing features. Happy shopping!