Round Face
Round face shapes are typically pretty symmetrical. They have the same width and length, a round jawline and chin. The square or rectangular glasses tend to be wider than a round face. They can enhance your face by making it appear slimmer and longer, adding balance to your round features.
Frames to Avoid: Rimless frames, round frames, and small frames will accentuate the roundness, making your round face look even rounder.
Oval Face
Oval face shapes have foreheads that are only a tiny bit wider than their curved chin, like an egg placed upside down. Many different frames, which suit an oval face have a strong bridge, are wider than the broadest part of the face, and are geometric in shape like rectangle, oval, square, round frames.
Frames to Avoid: Eyeglasses that are overlarge and cover up more than half of your face will throw off the natural balance and symmetry of the oval face.
Square Face
A square face has more angular lines with equally wide cheekbones, forehead and jaw.
Glasses that soften the angularity and sit high on the bridge of the nose look best on square faces. Oval or round eyeglasses will balance and add a thinner appearance to the angles of a square face.
Frames to Avoid: Angular and boxy eyeglass frames will sharpen and draw attention to your angular features, making a square face appear bulky.
Diamond Face
Diamond face shapes are narrow at the forehead and jawline and have broad cheekbones that may be high and dramatic. Play up a narrow forehead and chin with eyeglasses frames that sweep up or are wider than the cheekbones, such as cat eye glasses and oval frames. These frames will accentuate your cheekbones and delicate features.
Frames to Avoid: Boxy and narrow frames will accentuate the width of your cheeks, drawing attention to your narrow features rather than enhancing them.
Heart-Shaped Face
A heart-shaped face has a wide top third and a narrow bottom third. Frames that balance the width of the forehead with the narrowness of the chin are ideal. Eyeglasses with low-set temples and bottom-heavy frame lines will add width to that narrower part of your face. Round eyeglasses or square eyeglasses with curved edges will help draw attention away from a broad, high forehead.
Frames to Avoid: Steer clear of any style or color of frames that draw attention to the forehead. This includes frames with decorative temples or embellished tops.
Triangle Face
A triangle face shape has a narrow forehead and widens at the cheek and chin areas. To add width and emphasize the narrow upper third of the face, try frames that are heavily accented with color and detailing on the top half of the frame. Cat-eye or browline frames can be good choices.
Frames to Avoid: the square, round and oval frame with narrower width on the top half of the frame than the forehead is not recommended.
The key to finding the right frames is to remember that opposites attract. Select eyeglasses that contrast your facial contours and bring symmetry and balance to your prominent features.