Can You Use Poly Mailers for USPS? (2022 Facts)

Can you use poly mailers for USPS? The United States Postal Service (USPS) is an independent agency of the United States government responsible for providing postal service in the United States. It is one of the few government agencies explicitly authorized by the United States Constitution. The USPS traces its roots to 1775 when Benjamin Franklin was appointed the first postmaster general by the Second Continental Congress. The USPS has over 617,000 employees and operates more than 200,000 vehicles in the United States. The USPS is the second largest civilian employer in the United States after Walmart.

can you use poly mailers at usps

Can you use Poly Mailers for USPS?

USPS does allow you to ship items using poly mailers. Poly mailers are an alternative to standard packaging that are lightweight and sturdy plastic bags, perfect for shipping items like clothes. Shipping with a poly mailer is less expensive than shipping with cardboard boxes, and poly mailers come in various styles like bubble-padded and eco-friendly.

While you can use poly mailers for USPS, there are a few things to keep in mind. First, make sure that your item will fit snugly in the mailer. You don't want any gaps or loose items that could get damaged in transit.

Second, check the weight limit for the particular type of poly mailer you're using - overloading the mailer could cause it to rip or tear. Finally, be sure to include all the necessary postage for your package. With these guidelines in mind, shipping with a poly mailer can be a great option for both you and USPS.

What is a Poly Mailer?

Poly mailers are a type of shipping container that are essentially lightweight, sturdy plastic bags. That said, poly mailers are quickly gaining popularity as they offer a less expensive, easier, and more eco-friendly alternative to standard packaging. Also, poly mailers are easier to pack, ship, and transport than typical boxes and packaging.

Moreover, there are various poly mailers to choose from, including Bubble padded Standard poly mailers Expansion poly mailers Eco-friendly options Of all the poly mailers, the standard poly mailers are the most cost-effective option.

However, if you are looking for an eco-friendly option, there are also recyclable and biodegradable options available.

On the other side, bubble-padded poly mailers are a bit more expensive to use. Bubble padded poly mailers, on the other hand, include greater padding within to protect fragile things against potential impacts during transportation, they are cushioned all around to cushion against any possible impact points.

With that, bubble padded poly mailers are an ideal choice for items that need a little more protection from damage or scrapes that can happen in transit, such as wristwatches. manufacturers typically use thicker materials for expansion poly mailers than they do for regular poly mailers. Ultimately, whether you choose a standard poly mailer or an eco-friendly option, you will be able to save money and time while reducing your impact on the environment.

How much does USPS charge for sending via poly mailers?

The size, measurements, weight, and distance traveled of an item you're shipping are the main factors that influence USPS delivery rates. Because there are so many variables involved in determining the price of any given shipment, it's hard to tell exactly how much your mailing costs will be using a poly mailer.

However, thanks to their lightweight, poly mailers are less expensive than traditional packaging materials. In addition to being lighter in weight, they also assist to reduce the dimensional size of shipments since they can be fully sealed around their contents.

This is significant because dimensional weight is often used to calculate shipping prices - meaning that if your shipment takes up less space, you’ll save money. All in all, using a poly mailer will likely save you quite a bit of money on your shipping costs.

What shipping services can you use with Poly Mailers from USPS?

Poly mailers are lightweight, yet durable shipping envelopes that are often used for online orders. While they can be shipped through a variety of USPS services, the best options are First Class Mail, First Class Package, Priority Mail, or Media Mail.

With these services, your package is categorized as a “Thick Envelope” or “Package,” depending on the thickness.

Moreover, an envelope with a thickness of ¾” or more is defined as a “Thick Envelope.” On the other hand, any package thicker than 1.5″ is labeled a “Package.” Also, USPS First Class Mail or USPS First Class Package is the best option for any poly mailer shipments weighing 16 ounces or less.

The only caveat is that your poly mailer must weigh less than 70 lbs and the contents of the shipment must qualify for Media Mail. Some examples of items that cannot be shipped via Media Mail are CDs, DVDs, books more than eight pages in length, and vinyl records.

It's important to note that when using USPS Media Mail, USPS is allowed to open your package to verify the contents of the shipment do indeed qualify for Media Mail.

However, if you're looking to save on shipping costs for non-media items, you can also use USPS Priority Mail with any poly mailer weighing less than 70 lbs. All in all, using either USPS Media Mail or USPS Priority Mail is a great way to save on shipping costs for your business.

What are the USPS rules for Poly Mailers and Packages?

USPS is the most common shipper of poly mailers, so it has some rules and guidelines it expects you to follow when packages are shipped using poly mailers.

First, poly mailers need to be a certain thickness depending on the overall weight of the package to help prevent tears and bursting. For shipments up to five pounds, poly mailers must be at least 2″ thick, and for shipments up to ten pounds, poly mailers must be at least 4″ wide.

In addition, any overhang on shipments packaged using poly mailers must not exceed more than .5″ when a package is lying flat. These guidelines help to ensure that packages arrive safely and without damage.


In conclusion, the United States Postal Service does ship with poly mailers and is the most common shipper of packages using poly mailers. Poly mailers are an alternative packaging option that is more lightweight and eco-friendly than conventional packaging methods. For example, poly mailers are typically cheaper because they weigh less and take up less space.

Also, there are several different types of poly mailers, and the best USPS services to use when shipping with poly mailers are First Class, Priority, and Media Mail.

When using poly mailers, you must be sure you’re following USPS guidelines and rules, as well as any other applicable environmental regulations. With that said, poly mailers can be a great option for those looking for an alternative to traditional packaging methods.

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author: patrick algrim
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Patrick Algrim is a Certified Professional Resume Writer (CPRW), NCDA Certified Career Counselor (CCC), and general career expert. Patrick has completed the NACE Coaching Certification Program (CCP). And has been published as a career expert on Forbes, Glassdoor, American Express, Reader's Digest, LiveCareer, Zety, Yahoo,, SparkHire,,, FairyGodBoss,, St. Edwards University, NC State University,, Thrive Global,, Work It Daily, Workology, Career Guide, MyPerfectResume, College Career Life, The HR Digest, WorkWise, Career Cast, Elite Staffing, Women in HR, All About Careers, Upstart HR, The Street, Monster, The Ladders, Introvert Whisperer, and many more. Find him on LinkedIn.

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