I use these mostly for baking. Either alone on a rack or on a cookie or sheet cake pan. You can customize the fit for deeper pans like the standard 8"×8" or the 9"×13" metal or glass ware. Such a simple clean up after. No sticking to the bottom so after cooling just turn upsidedown to release you culinary delight. Pineapple upside-down cake is so easy to do I am amazed with the performance of these. I had some I purchased a few yrs ago and they finally wore out but partly my fault because I cut on them and that is not recommended. But a pair of scissors and you can customize the fit for any pan or dish. I even place them on the rack just below the one I'm baking on for on the rack items like frozen pizza. Anything dripping off goes on this sheet not the oven bottom. I absolutely adore these magnificent baking and grilled sheets and am sure you would love them too. And they are definitely an excellent value.