Product review (1 stars): Product description is inaccurate
July 10, 2015 update:  I see that these covers are now being sold for over $13; in 2007 I paid much less for them and thought they were overpriced.  As burner covers, the only way they will sit properly, depth wise, is if the burner head is flush with the rest of the cooking surface, or, with my new stovetop, there is a raised iron panel over the burner where the cover can sit levelly.  Do not try to guess and hope that these covers will fit a raised burner.  The other concern is that the spacing of the burners may preclude using them.

Do not pay attention to the 9 x 9 x 2 inch product description if you are wanting a deep cover.  I tried unsuccessfully with Amazon and the vendor to verify ahead of time the depth of these covers.  Amazon didn't know and referred me to the Corelle vendor, which also did not know.  I took a chance because most of the time Amazon's dimensions are accurate.  While they are 9 inches square, not only are they not 2 inches deep; they are only 7/8 inch deep.  These covers should not even be classified as gas burner covers because at that depth they are more suitable for electric ranges.  They are also more cheap looking in person than what the picture displays.  For $5.63 they are not worth my time to return.  Thinking outside the box, I'm going to use them under plants on my patio.