Brand new in box. Made with FDA approved food grade silicone surrounding a flexible mesh. Great for kneading dough, candies, baking cookies, croissants and pastries. Replaces parchment and wax paper. No need of those synthetic sprays. Withstand temp from -40 to 482 F. Half sheet 11.62 in X 16.5 in and toaster oven sheet 9in X 12 in. Can also be used in microwave ovens. Thanks for looking and bidding. Liners will be taken out of the box to save on shipping. The original box will be folded and shipped with the liners. Free shipping to lower 48 US States only.