This plain safety glass is like the 488SB bifocal version but has no magnification. It is for the person who does not need any correction or is wearing this style over their contact lenses. They have a padded frame to insure a tight fit without any discomfort. They meet all the criteria of the ANSI safety standards board. Frame Measurements: 5 1/4" x 1 5/8" (temple to temple x height of lens)