Three frame size information will normally be marked on the temples in millimeters (mm) as unit.
In order to choose the suitable glasses easily, we will provide a total of five frame size information, shown as below : A, B, C, D, E.
(A) Len Width
(B) Len Height
(D) Temple Length
The total width of the glasses (E) and the length of the lens (D) are the most important dimensions for choosing a suitable frame. If you choose bifocal or multi-focal lens, you should also pay attention to the lens height (B).