I got these silicone mats to make cookies with because they fit my good cookie sheets. I also use these to do any easy baking such as corn dogs, taquitos, and garlic bread. It keeps the cookie sheet from getting dirty, there is no sticking, and it eliminates the need for any cooking spray. These are perfect for my holiday cooking coming up in December and I love how they fit!
https://www.amazon.com/gp/aw/d/B00TXR2HBQ/ref=yo_ii_img?ie=UTF8&psc=1