The cost of sending Media Mail is determined by your package’s weight. For a book that’s 1 pound or less, you’ll pay $2.75 for shipping with Media Mail. For each additional pound, add 52 cents to your total. For example, shipping a 5-pound book through Media Mail will cost $4.83 in postage. Media Mail shipping rates are based solely on weight and will remain the same whether you're mailing a package across town or across the country.