Nonstick, precut, reusable parchment paper is your best baking assistant. There's almost nothing it can't make easier. Each sheet of perfectly flat parchment measures 16½" x 12¼", which is just the right size for most cookie sheets, and it nestles perfectly into our half-sheet pans without any curling or adjusting required. It's oven-safe to 450°F, strong, reliable, and trusted by the best in the business.