Once you select the desired service (Priority Mail), you can review the label and make any necessary changes before saving it as a PDF file and printing it. Make sure that no old shipping labels are on the box.

Print Priority Shipping Label – From the USPS website, you can download and print your domestic or international “Click-N-Ship” label by entering your return and delivery address, shipping date, package details, and other information.

You can double-tape the openings and edges to increase security and minimize tampering.

Seal Package – Make sure you seal the package, preferably using a tape dispenser to simplify the process.

Pack in Goods – Once you’ve verified the box dimensions, you can start packing the goods up to the required weight limit detailed in the section below.

So, make sure you use a measuring tape to measure the distance around the thickest part, so it doesn’t exceed the maximum allowable dimensions. As per USPS, the maximum combined length and girth can be no more than 108 inches.

Measure Your Box to Verify – Once you’ve picked a box, you need to verify its dimensions.

You can either make your box using cardboard and tape or use any old packaging available at your disposal.

Select a Box (New or Used) – The first step is to find a box that meets USPS’ size and condition requirements, detailed in the section below.

How to Use Your Own Boxes When Shipping Priority Mailīelow are the key steps to using your own boxes to ship parcels instead of using Priority-branded USPS boxes: However, it’s important to note that using an official Priority Mail box is compulsory when you’re shipping an envelope or a Flat Rate Box. In this article, we’ll share a simple guide to using your box when shipping Priority Mail and important details to consider.

The answer is yes! You’re allowed to ship Priority Mail using your own boxes, given that they meet the size, condition, and label requirements. While you can purchase Priority Mail boxes online or at the post office, many people wonder if they can ship Priority Mail using their own. It is commonly used by eCommerce sellers to expedite the delivery of parcels weighing up to 70 lbs or 108”. Priority Mail is the fastest mailing service offered by the United States Postal Service (USPS).

Flat rate shipping usps box sizes