54-18-135-28-130. The first number 54 represents the lens width, 18 is the bridge width, 135 is the temple arm width, 28 is the frame height and 130 is the total width of the frame (that is from temple to temple). All the sizes are listed in millimeters and while selecting a frame you would need to make sure that the last measurement (total width) matches the dimension of your current frame.