Lens Width 47 – 19 – 145
This is the horizontal width of each lens at its widest point. It typically ranges from 40mm to 60mm.
Bridge Width 47 – 19 – 145
This is the difference between your two lenses. The bridge width is the space where your frames fit against your nose. The size of this ranges from 14mm to 24mm.
Temple Arm Length 47 – 19 – 145
This is the length of the temple from each screw to its temple tip, including the bed that sits on the ear. The temple is typically 120mm to 150mm.