Face shapes differ and the best way to determine yours is to look at yourself in the mirror or you can also ask someone to help you out.
Faces shaped like a diamond are best characterized with the cheekbones and forehead being the widest portion of the face while the jaw line is narrow. Rimless and oval frames can look great with high or wide cheekbones. If you have a diamond face, you should go for frames featuring gentle curves and are not any wider than your cheekbones.
A heart-shaped face or also referred to as triangle is narrowest at the chin and widest at the temples. The ideal shades for triangle and heart-shaped faces are those with wide longer edges without straight lines on the upper portion since these have the tendency of shifting the attention downward that can make the face look much longer.
Sunglasses featuring rounded edges or cat-eye styles are great options to achieve a more balanced appearance for the wearer. This specific face shape is most suitable for aviator-styled, shield, butterfly, or rimless frames.
People with oval faces can pretty much consider themselves lucky because almost all frames look awesome on them. An oval face has fairly even and gently rounded features and any frame can pretty much work well on it. Everything works including sport and designer glasses or whether the glasses are for function or fashion purposes.
The only important thing to remember here is to avoid large frames that can block out the lovely symmetrical features. Opt for shades that will only cover your face starting from your eyebrows down to your cheekbones.
Rectangular or Oblong
Oblong or also known as rectangular faces are narrow and long with some angles. Oblong faces work particularly great with oversized shades. Larger rectangular lenses or wayfarer and shades with thicker frames can add more width to a longer face.
One more option is a pair featuring deep or tall lenses and frames of vintage style, which you can buy at the Crulle online store, since the bold lines and sharp angles can give and edge to oblong faces that can sharpen features that are otherwise soft.