Oval face

An oval face is balanced. Your chin is slightly narrower than your forehead and you have high cheekbones.

• The best sunglasses will have a square shape, like Kristen or Rachel from Polaroid Sunglasses.
• Ones that wrap around the face will show off cheekbones to their full potential.
• People with oval faces are lucky enough to be able to get away with most styles. Take your pick!

Celebs: Kate Moss, Jessica Alba

Heart-shaped face

A heart-shaped face typically has a wider forehead and high cheekbones which then tapers to a smaller chin.

• Avoid dark colours which may ‘cut up’ the line of the face – instead, opt for lighter shades, like the Carol's in brown.
• Hearts can suit both round and angular glasses as they contain both angular and round shapes.
• Create balance by selecting shades that widen out the rest of your face.
• Alternatively, accentuate the eyes with cat-eye shapes or more width in the top corners.

Celebs: Victoria Beckham, Jennifer Anniston, Reese Witherspoon

Square face

A square face has a strong jawline, a broad forehead and wide cheekbones.

• Oval and round  frames  like Swing from the Best under the sun heritage collection or Ninna from the Women's Premium collection will instantly soften your features.
• Avoid square or rectangular frames – these will only accentuate square angles.
• Try tortoise shell instead of black to stick with a softer look.

Celebs: Demi Moore, Mary-Kate Olsen, Paris Hilton

Round face

A lovely round face has very few angles and often the width of your face is equal to the length.

• Look for styles equal to or slightly wider than the broadest part of the face.
• Minimize the curves and add definition with more angular, rectangular styles (think Natasha or Miriam).
• Deep colours will minimize fullness, so try chocolate-browns or warm reds and pinks.

Celebs: Katherine Heigl, Kirsten Dunst, Kate Winslet