Square-shaped faces have wide, angular features and are particularly suited to round sunglasses. Rather than mimicking features, it will provide a stylish, balanced look.
If you have a round-shaped face, that means your face has soft features with real symmetry as well as a wide curved jawline and a broad forehead. To compliment this, it’s best to go with sunglasses with an angular style to sit contrast to your rounded features. In this regard, both rectangular and square glasses will suit you perfectly.
Diamond-shaped faces are characterised by high, strong cheekbones and narrow, pointed chins, with a collection of striking angles at both the chin and hairline. Round glasses are the finest fit for this shaped face, with their softening angular lines, but the right pair of square and rectangular glasses will suit diamond-shaped faces too.