Our popular natural aluminum half sheet with a deluxe silicone liner and steel cooling grid is the perfect set for your kitchen or an even more delightful gift for your favorite baking friend Naturals Bakeware collection is made of pure aluminum for superior heat conductivity and produces consistently evenly browned baked goods every time Our deluxe liner is encapsulated in food grade silicone for durability. No greasing required and replaces parchment paper and sticky nonstick sprays. Pan exterior dimensions 17.9 x 12.9 x 1 inches and interior dimensions 17.1 x 12.1 inches. Mat measures 16.1 x 11.1 inches and grid measures 16.9 x 11.5 x 0.9 inches. Made in America of domestic & imported materials & components