Contrast the shape of your shades with the shape of your face. Round faces are not suited for round shades, and look best in geometric shapes, ovals and wraps.
While most square and thin faces look better in rounder frames, oval faces can carry off almost any style.
When it comes to colour, the choice is endless. But keep in mind your outfit for the day and your complexion; look for a hue that flatters both.
Bulgari recommends alternating between captivating greens and the classic shades of grey and caramel for a distinctive look.
Photograph: Bulgari
Also read: What's your hat style?