25 yd x 12 in. For cooking, freezing, wrapping & storing. What is Aluminum Foil? Aluminum foil starts from a large solid block of aluminum. It is rolled, much like pie crust is rolled, until it becomes a long thin continuous sheet. Right & Wrong: Aluminum foil has neither a right or wrong side. The shiny surface on one side of the foil is the result of a rolling manufacturing process that allows you the option of a bright sparkling surface or a shiny satiny surface. The difference in reflectivity...