A style of sunglasses with thin frames and large lenses, usually wider on the outside edges and narrower next to the nose

Characterised by or decorated with regular lines and shapes. "a geometric pattern"

Relating to or constituting a hexagon; having six straight sides and six angles. In Ethical Eyewear terms, sunglasses may roughly resemble this shape

Having the form of a circle. In Ethical Eyewear terms; the shape may be loosely based on a circular shape for categorising purposes.

The form is closely related to the browline style, differentiated by having an upsweep at the outer edges where the temples or arms join the frame front.

Having the shape or approximate shape of a square.