Book or "Media Mail" rate goes by the pound. Also, there are strict restrictions on the contents being books. If they suspect that it is not a book, they will open it & return it to sender. Go to USPS.com & click on "Media Mail" to get the correct postage for eah lb. added.
The Priority Flat Rate Mailer is $4.75 if you print the label on their website or $4.95 if you go to the post office. Flat Rate Mailers do not hava a weigh limit, but they cannot be stuffed to buldging. When printing Priority Mailing labels on the website, the Delivery Confirmation is "free".
Originally Posted by carolaug
If you go to a post office and state its a book its under 3.00 any size or weight...I am sure if you need to track it the price will be a bit more. You do have to tell them its a book.