Although this product is accurately described with regard to the dimensions, they are very misleading. Depending on the construction of your eyeglasses they may not fully cover the lenses - they do not on mine. I carefully measured my lenses and found they were very close to the size of this product. However, the construction of my frames and the hing part of this product, caused them to sit very high on the frame, This caused almost a full 1/4 inch, at the bottom of my lenses, to remain uncovered by the product. In addition to a curved piece holding my glasses together, there is a top bar. This bar  running across the top of the frame, prevented the product from sitting low enough to cover that bottom 1/4 inch. My suggestion is to buy a pair of clip on sun glasses in a store, where you can experiment to make sure they will cover your lenses completely.