Frames are identified by manufacturer/designer, model number or name, size, and color information. Size information contains the horizontal measurement of each lens in millimeters (i.e. 47) and bridge size (the distance between the lenses) i.e. 18. This information can help you in sizing a frame for your face. To better understand the frame size, double the first number and add the second. This will give you the distance across the full front of the frame. For example, a frame size of 47/18 means that the frame measures 112 mm across (47 x 2 + 18 = 112).
Frame size may also contain the temple length (including the portion going behind the ear) in millimeters such as 145. Therefore a frame size would be written 47/18 or 47-18 or 47/18-145. Color may be noted as a description such as gunmetal, other manufacturers use a color number. NeoVision’s opticians will help you in choosing the right size frame for the best possible fit.