However, you’ll still need to pay for postage to ship them, just like we talked about. Pro Tip: You can order free Priority Mail shipping supplies on the USPS website! USPS will deliver them directly to your door at absolutely no cost to you, and you can place orders in quantities of 10 or 25.

The flat rate packaging itself is free, but you still need to pay for the postage to ship them.

Yep, you just read that correctly: Priority Mail Flat Rate boxes and envelopes from USPS are free! This is precisely where a lot of shippers get mixed up, though. That’s why a lot of shippers love flat rate services as long as your items fit inside the packaging and weighs less than 70 pounds, the cost to ship it won’t change at all! Oh, and did we mention that the branded flat rate packaging you get from USPS doesn’t technically cost anything? USPS Flat Rate Boxes and Envelopes are Free (but You Still Need to Pay for Postage) Wondering how much USPS flat rate boxes and envelopes cost? Flat Rate products are some of the Postal Service’s most popular shipping services, and can be an economical way to send smaller shipments on the heavier side.

Priority mail small flat rate box price