As with any personal accessory, there is a right way and a wrong way to wear sunglasses. They will either protect you and make you look suave and charming, or they will (hopefully) protect you and make you look like a first-class asshole. Unfortunately, there is usually no middle ground.

When it comes to shopping for sunglasses, most of us have a hard time choosing something stylish and eventually walk out of the store empty-handed and frustrated. That is why it is important to determine your face shape in advance, as it will help you find the perfect pair of frames to suit your face shape.

To find out if your face is long, square, oval, round or heart-shaped; Take a photo of yourself looking directly into the camera, and then draw along the edges of your face. An easier way to do this is to stand in front of a mirror and use an erasable marker or even lipstick, whichever you find first, to draw along the edges of your face. This sounds weird, I know, but it works. Once you’ve figured out your shape, choosing the perfect pair of sunglasses will be a piece of cake.

Find the shape of your face and the sunglasses that suit you best with this guide.

Oval face: Mild angles that taper slightly from forehead to chin, often with prominent cheekbones. Oval faces are the lucky few that look good in any frame!

frames: Wear sunglasses that cover you from the eyebrows to the cheekbones and avoid large frames.

square face: Forehead, cheekbones and jaw about the same width.

frames: Round or oval frames, such as aviator or butterfly, will help smooth out any sharp edges.

round face: The face with the same width and length with full cheeks and less defined angles.

frames: Use sharp, angular lines to help elongate the face and make it appear slimmer and more defined. Rectangular, square, wraparound and shield shapes are perfect for round faces.

heart face: A face that distinctively tapers from the temples to the chin.

frames: Wide bottom edges draw attention downward, thus elongating the face. Try round shapes like cat eye, butterfly or aviators.

long face: A long, narrow face with few angles.

frames: Large, thick, rectangular frames to add width, while sharp angles and bold lines will enhance soft features.

Once you figure out your face shape and frames that look good on you, go crazy! There are a wide variety of colours, shapes and sizes to choose from when it comes to sunglasses and finding the perfect pair means you have a great accessory to last a lifetime.