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)
39
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.
Ideal for medium to large faces, the Mainstay FNDTN012 boasts a straight browline and squared lens edges that look great against rounded faces with tall brows. Its saddle bridge suits longer, narrower noses. Note: due to frame thickness, this style only accommodates prescriptions from -4.00 to +2.50.
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