The style number of each pair of glasses starts with 2 letters, including an S, M or L. This indicates if your glasses are small, medium or large fit (ie.MP393-99 is a medium fit frame while FL7349-12 is a large fit.) There are also three numbers associated with each style, following the format 57 ☐ 16 ☐ 140. These numbers indicate the lens width, bridge size and temple length in mm, respectively. These can be found on the inner right temple of your glasses, or on our websites product pages.
