Be sure to purchase a two-piece tube pan for ease in unmolding. A standard pan holds 16 cups and is 10 inches by 4 inches; these pans are carried by Wilton and also distributed by Allied Metal Spinning. However, over the past few years, the standard-size angel food pan seems to have shrunk, and many other brands’ pans hold only 14 cups. To measure the volume of your pan, line it with a clean plastic bag to prevent leaking and then fill it with water, cup by cup (see note). If your pan is smaller than 16 cups, you may want to decrease the recipe, or fill the pan almost to the top and bake the excess batter as cupcakes.