Frame size is determined by the three key measurements found inside the frame arm: lens width (from 31-60mm), bridge width (from 12-31mm), and arm length (from 115-155mm).
Your lens height (mm)
40
Lens height is essential for multifocal prescriptions, such as Progressives, which require a minimum measurement of 28-30mm. They are also recommended for Rx sunglasses.
The Saint Lewis features a slim half-rim rectangular frame. Made of metal, the temple tips are plastic-covered to ensure comfort. Spring-hinged temples and adjustable nose pads keep the glasses in place.