Sunglasses Bridge Size
Bridge or bridge width or bridge size is the area that arches up between the lenses over the nose and supports the majority of the weight of the glasses. The bridge measurement is the distance between the lenses and typically ranges from 12 mm to 26 mm
Supposing our sunglasses have the following dimensions: 56–18–140, the second number 18, refers to the bridge.
The sunglasses dimensions used as a reference are Emporio Armani EA 4060 5017/8G 56