I bought new frames last year and I needed new clip-ons this summer. I really like the clip-ons, it's a style that suits me. I measured my lenses/frame carefully, went by the measurements given for this product, and it fits perfectly. I'm am delighted with these clip-ons! I can feel my eyes "relax" as soon as I put them on. I love the case they come in, they don't get dirty from sitting in the console tray! And they have their own cleaning cloth, too! An excellent value for the price, it's the lowest price I've ever paid and I bought my old clip-ons at Sears at least 8 years ago. I didn't even see the little picture card that was in the case, and when I noticed it I was curious. If you look at the "scribble" through the ciip-ons you can see the entire picture, demonstrating how these block certain light rays. I just know these are very easy on my eyes and make a huge difference when I drive.