A Complete Guide on Using Poly Mailers

A Complete Guide on Using Poly Mailers

You probably know what poly mailers are and may have also used them. In the world of packaging, poly mailers are versatile envelopes that give a lightweight and cost-effective solution to ship items of all shapes and sizes.

Also referred to as mailing bags or shipping bags, poly mailers are also highly durable thanks to their moisture-resistant properties.

But how did they come into being? What exactly are they made from? What types do they come in? What can they be best used for? And how do you ship them? Is it wise to get wholesale poly mailers in bulk? Are customizable poly mailers available?

In this comprehensive guide, we'll answer all these questions and more, diving deep into the fascinating world of poly mailers. Stay put!

What are Poly Mailers?

Short for polyethylene mailers, poly mailers originated during the 1950s as a more eco-friendly and durable alternative to traditional paper envelopes.

In the years that followed, the rise of eCommerce significantly increased their use. Today, poly mailers are widespread as an efficient and protective shipping solution, with more and more consumers shopping online.

What Are Poly Mailers Made From?

As their name suggests, poly mailers are made from a type of plastic called polyethylene. This plastic is known for its light weight and durability. It is also tear-resistant and water-repellent.

What are Poly Mailers Used for?

Varied industries use poly mailers extensively. But which sector uses them the most?

  • eCommerce: It's no secret that poly mailers provide an excellent solution to ship clothing, accessories, electronics, books, and much more. The increase in online shopping has led to the eCommerce sector using poly mailers the most among all industries.
  • Textile: The fashion industry also uses poly mailers to ship garments, footwear, accessories, and more.
  • Publishing: Poly mailers are used to ship numerous magazines and catalogs.
  • Marketing: Customized poly mailers are used for branding and building lasting customer impressions.

Why Should You Use Poly Mailers?

With their versatility, poly mailers bring many benefits that make them a great option for shipping, regardless of your business sector. Here are the top advantages:

  • They're lightweight.
  • Thanks to their light weight, they can reduce your shipping costs.
  • They're highly durable and protect against rough handling.
  • They shield your content from moisture with their water-resistant capability.
  • They ensure security with their self-adhesive tapes and tamper-evident seals.
  • They can be customized with branding and personalization elements to improve your brand image.

Types of Poly Mailers Available

In addition to their varied sizes, poly mailers come in multiple types based on their materials and level of protection.

  • Standard Poly Mailers: The go-to option for most businesses, these poly mailers give you the essential protection and affordability you need.
  • Bubble-Lined Poly Mailers: Ideal for fragile items, these poly mailers have an inner layer of bubble wrap for added cushioning.
  • Kraft Poly Bubble Mailers: Kraft poly mailers are made of eco-friendly kraft paper, with a bubble wrap layer inside and a water-and-tear-resistant layer outside.
  • Customizable Poly Mailers: These are great for branding and marketing. You can personalize them with your logo, designs, or message.

Your Poly Mailer Size Guide

Pick the right poly mailer size to ensure a secure and snug fit for your items. Here's a quick guide:

6" x 9" Small items like jewelry or accessories
10" x 13" Clothing or bulkier accessories
12" x 15.5" Larger garments or lightweight shoes
14.5" x 19" Clothing, shoes, and smaller electronics
19" x 24" Larger items or multiple products in one package

How to Ship Poly Mailers?

While shipping poly mailers is a breeze, a few tips can ensure a smooth process. Here are five tips to help:

  1. Ensure your mailer is securely sealed and any tamper-evident features are intact.
  2. Print or write your recipient's address and return address legibly to avoid delivery issues.
  3. Use appropriate shipping labels and paste them securely onto the poly mailer.
  4. Weigh your poly mailer package correctly to prevent underpaying or overpaying for postage.
  5. At your convenience, drop off your poly mailers at a local post office, arrange a pickup, or use a courier service.


Poly mailers are an undeniably convenient shipping option, thanks to their light weight, protection, and durability. They're highly versatile and handy regardless of your business size or industry. Plus, they are cost-effective.

So, whether you need wholesale poly mailers in bulk or customizable poly mailers to enhance your brand, you know exactly where you can find them!