If you have a round face (a full face with a round hairline and chin), your goal is to find a sunglasses frame that will help to elongate it. Look for frames that are equal to or just slightly wider than the broadest part of your face. Square-ish or angular frames can help to give you a longer, leaner profile. Avoid very round frames. An additional accessory that can help lengthen your face is a fedora or panama hat.
A square face shape (a strong, square jaw line and a square hairline) can be softened with the right pair of sunglasses. Look for frames with a curve on the lower part, and a frame that is thicker on the top than on the bottom. The frame should, ideally, be wider than the widest part of your face. Avoid rectangular shaped frames, as this will make it look wider. Frames with a light pattern, such as tortoise shell, can help to add subtle curved lines. Another accessory that can help to compliment a strong square shaped face is tie in a classic Windsor tie knot.A bowler hat can also help to add a bit of roundness to your look.
If you have an oval face, this means that the shape is very nice and balanced. You can get away with most sunglasses shapes and styles, but your goal should be to maintain the symmetry of your face. You can wear round, square, or rectangular shapes. Look for frames that are at least as wide as the broadest part of your face. If your ears are more prominent, try adding a gambler hat or a wide-brimmed fedora to your accessories wardrobe.
A face that is either long and narrow or rectangular can benefit from a sunglasses style that will make it appear a little bit fuller. Look for frames that will create visual interest at the sides of your face, such as ones with decorative or contrasting color temples. Avoid frames that have too much weight on the bottom, or where the frame is thicker on the bottom than on the top. If you are oblong, avoid wearing vertical lines close to your face. Look for a hat such as a fedora or derby with a wide band in a contrasting color, which will make your face appear shorter.
Heart shaped or triangular:
If your face is triangular or heart shaped, meaning that your face is widest at the forehead and narrowest at the jaw, you should select frames that add balance to the lower half. Frames with a straight top line, such as classic aviators, are a good choice. Rectangular frames are also a nice choice. Look for complimentary accessories that accent your cheekbones, such as a fedora, bowler hat, or panama hat. A skinny tie can also help elongate the face by drawing the eye up and down.