How to choose sunglasses for your face shape

How to choose sunglasses and eco-eyewear to match your face type doesn't have to be difficult. There are certain basic guidelines to follow; face shape, frame size and colour preference. The first step is to understand your face shape. 

Determining Your Face Type

For the simplicity purposes, a general rule of thumb is the more square a face is, the more curves your sunglasses should have; and vice versa. This simply ensures your new sunnies compliment the shape of your face rather than distorting it. 

I've outlined the most common face types below, with suggested sunglasses shapes:   


Round Face Type 
Round Face Types have less defined angles and noticeable curves around the cheekbone and chin. They're measurably  'round' taking into account the forehead to chin, ear to ear. 
Round Face types rock Square and Rectangular Shaped frames;  like the rectangle Bruno, or square Fitzroy 

Square Face Type 
Square faces are similar  to above but with more defined cheekbones and chin features.

Square is defined as the similar distance between width and the length of the face.This face type is perfect for frames with more curvy angles; such as aviators, round or oval type sunglasses. Try going for the gorgeous Rosewood Ayden or the smaller fitting Atticus 


Oval Face Type  
 If you're Oval, you're the lucky one! Most Frames will suit oval shaped faces. If you're fortunate to be blessed with features of the oval kind, be sure to experiment with different frames - and leave your concerns to matching outfits and seasonal clothing.
Go forth you lucky thing. Probably the only exception is not to go too large so as not to hide your facial features.
 Diamond Shape Sunglasses
Diamond Shaped Face Type
A diamond shaped face is defined as narrow forehead and jawline and wider cheekbones. These facial types are suitable for oval shaped, half wood and also browline shaped frames. Check out either the Roscoe, for a natural brown wood frame, , or a more oval, updated Emerson
Triangle Shaped Face Sunglasses
Triangle Face Type
A Triangle face (also known as Heart Shaped) means wider points at the temple and forehead, going narrow towards the chin. Think Kate Moss or Daniel Radcliffe... Whilst most frames would suit, rounder edged sunglasses would suit this frame. A classic wayfarer style is nice, as well as oversized oval and round type sunglasses.
Sizes for Faces
You'll notice on the description page measurements like this (for example) 52-22-149 - this is an industry standard meaning (in cm) lens width-bridge-temple length. 
These measurements can be used to ensure your pupil is as close to the centre of the lens as possible (by using the Lens width and Bridge width) and if the temple arm would comfortably hug your ear for a non-slip fit.  
Another point to consider is the thickness of the frame. Bamboo frames tend to be thicker, giving a more classic look, where as premium layered wood tends to be thinner; competing with more traditional frame material styles.
Whilst this should be seen as a guide only to common aesthetic principles (round face = square sunnies), there's no reason not to experiment or try new frames that break the norm!