[header] How to make a file folder [title] Buy your materials. [step] There are many different types of materials you can use to make your folder. You can use paper, paper stock, cardstock, or cardboard. 
You can find many different patterns and designs of these materials in craft and hobby stores. Most documents stored in file folders are 8 1/2 by 11 inches, so make sure you buy pieces that are at least two inches larger on each side.