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Poly Mailers

Poly mailers are a great way to ship items through the mail system for low cost. Lightweight, durable and in several sizes, we have a poly mailer option for you.


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Custom Poly Mailer Details

When keeping your shipping supply cost low, stocking custom poly mailers is a must. These envelopes brand your business while cutting costs. Poly bags are sturdy but lightweight, protecting your finished product on route to it’s the destination. We print our custom poly bags in a variety of sizes, designs, and colors.

We also offer custom poly bubble mailers to help protect your more fragile products. These polyethylene mailers are lined with bubble wrap to cushion the contents from damage when traveling by USPS, UPS or FedEx.

Custom Poly Mailer Specs

Select any color or design for your custom u-pack poly bags. We sell the following thicknesses for both poly bags and poly bubble mailers. Determine the necessary thickness by measuring in mils- 1 mil is .001 of an inch!

1. Thickness

  • 2.0 mil – Our thinnest option of mailing bag, this option is right for items with no fragility. Clothing pieces, textiles, marketing materials, and light paper goods will do well in there.
  • 2.5 mil– This medium option of thickness is perfect for a little more security around fabric items or clothing items like t-shirts. Lighter books and papers will also have additional protection in this weatherproof and tear proof package.
  • 3.0 mil– If you need a truly tough version of polyethylene envelope, the 3.0 mil will protect all its contents. Waterproof, tearproof and equipped with a high-quality adhesive strip, your goods will be safe in this shipping option.

Need something even stronger? Contact us for your custom options!

2. Color

In addition to custom thicknesses, we offer poly bags in a variety of colors. We also offer matte options and metallic for an extra kick to your product delivery! Finally, clear poly bags are available and can be handy for enclosing how-to instructions, installation guides, and other important paperwork.

3. Dimensions

Our poly mailers come in the following dimensions:

  • 6″ x 9″
  • 7.5″ x 10.5″
  • 9″ x 12″
  • 10″ x 13″
  • 12″ x 15.5″
  • 14.5″ x 19.5″
  • 19″ x 24″
  • 24″ x 24″

Keep in mind that you can always reach out to our sales reps to determine the size that will best suit your needs. If you clue us in on what you plan to ship in your poly mailers as well as the level of fragility, we can help determine what will work best. Call us at 1-800-205-9005, email us or use the live chat option.

Saving Money on Shipping

Looking for other ways to save money on shipping? Read 10 of our favorite hacks to cut costs when sending products or packages through the mail. You can find out how to “Save Money on Shipping with These 10 Hacks!

What is a poly mailer?

Poly mailers are light-weight, protective shipping bags. They are made from a durable, waterproof plastic material called polyethylene. In essence, they’re plastic bags made for shipping! You can customize these mailers to any colors. Traditional poly mailers are white and gray.

What is the difference between a poly mailer and a bubble mailer?

A poly mailer is just the thin plastic bag, without lining. When you add in additional cushioning, such as bubble wrap, it then becomes a poly “bubble mailer” used for shipping more fragile items.

How do you ship a poly mailer?

Shipping your goods in a poly bag is super easy. Just pack up the desired item and close the self-sealing edge. Although it’s not necessary, you can always make the envelope even more tamper resistant by stretching shipping tape over it for reinforcement. Then, drop it off at the post office or contact your mail provider for a pickup!

How much does a poly mailer weigh?

Because most poly mailers are only the thickness of a few thousandths-of-an-inch, they’re incredibly lightweight. Because of this fact, the post office won’t add cost for a heavy package. You can store lightweight poly mailers more easily. Heavier mailers like kraft bubble mailers and cardboard take up more space.

What kind of goods are poly bags used to ship?

You will use poly bags to protect non-fragile items during the shipping process. If you’re shipping fabric or soft, pliable products, a regular poly bag of 2.0 mil will work wonderfully! However, if you’re sending something ridged with sharp edges like a hardcover book or a box, you’ll want to double the mil. Think of the mil as the edge strength of the poly envelope- the higher the number, the stronger each edge.

Are poly mailers recyclable?

Yes, they are! In fact, look inside the plastic bag. Dark gray means your mailer is made of recycled poly. If it’s white, it’s probably made of never-been-used plastic. If you’re curious about the creation and recycling of these products, check out this informative video from Lumi!

Is a poly bubble mailer considered an envelope?

Yes. USPS counts bubble mailers and other padded mailers in the large envelope category. However, USPS does not consider regular poly mailers large envelopes because of their thin and lightweight nature.

Need help with your Poly Mailers? We offer FREE DESIGN SERVICES!

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