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)
43
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 Derek Cardigan Haedi, is a subtle stunner. The slender rounded metal D-frame features flexible spring-hinged temples and adjustable nose pads. The contoured, acetate-sheathed arms are embossed with the brand's iconic symbols.