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Choosing the Right Poly Mailer Bag Size for Your E-commerce Business

by Rahul Solanki 19 Jun 2023

When it comes to shipping products for your e-commerce business, using poly shipping mailers can be a cost-effective and convenient solution. These lightweight and reusable bags not only help reduce shipping costs but also provide protection for your items during transit. In this guide, we will share tips on choosing the right poly mailer sizes and maximizing the packaging space to optimize your shipping process. Let's dive in and explore how Infinite Pack can assist you in finding the perfect poly shipping mailer bags for your needs.

What Size Poly Mailer Bag Do I Need?

Finding the right size poly mailer for your project can be a challenge. There are many different sizes and shapes available, so it’s important to know which one is most suitable for your needs. To help you determine what size you need, we have put together some tips to consider when making this decision.

The first step in finding the right poly mailer sizes is to measure the item or items that you want to store. This will give you an accurate idea of the size of the bag you need. If your item is a large piece, such as furniture, it’s important to measure from all angles so that you can determine the minimum diameter and height needed for a proper fit.

Understanding Standard Poly Mailer Sizes:

At Infinite Pack, we offer a wide range of poly mailer sizes to accommodate various products. While the standard size across shopping and shipping platforms is typically 10" x 13", we also provide options such as 6" x 9" for smaller items and 14.5" x 19" for larger products. Having different sizes available ensures that you can find the ideal bag size to suit your specific shipping requirements.

Consider the Size of Your Product:

Choosing the right poly mailer bag size starts with accurately measuring your product. For regular-shaped items, use a ruler or tape measure to measure the length, width, and depth. In the case of cylindrical or irregularly shaped objects, measure them rectangularly. If you're shipping clothes or fabrics, fold them instead of rolling to optimize the use of space. Our Eco-friendly Packaging Tips for Clothes guide can provide additional insights into efficient folding techniques.

Selecting the Appropriate Mailer Bag Size:

Ideally, the mailer bag should be slightly larger than the dimensions of your product to ensure proper wrapping and sealing. Using an undersized bag can lead to tearing and damage during handling and transit, while an oversized bag may result in increased shipping costs due to dimensional weight. To determine the minimum length and width sizes for your mailer bags, you can use our simple formula:

Mailer size = (L + H + 2") x (W + H + 1/2”)


  • L – Product length
  • W – Product width
  • H – Product height/depth

This formula provides a rough estimate of the required mailer bag size. Alternatively, you can utilize our shipping bag sizes calculator for quick and accurate readings. Additionally, major shipping labels like USPS, UPS, and FedEx offer dimensional calculators that factor in the billable weight based on the total number of products and their dimensional weight.

Considering Cushioning and Shipping Specifications:

For delicate and valuable items, cushioning is essential to protect them during shipping. Keep in mind that cushioning reduces the internal dimensions of the mailer bag. If you require padding, adjust the size of your mailer bag accordingly. Bubble mailers are an excellent option for small, fragile items, as they provide additional protection while reducing packaging waste.

It's crucial to adhere to the size and weight guidelines set by shipping companies to avoid delays and potential returns. Discrepancies between specified and actual dimensions can lead to review processes and increased shipping costs. Ensure poly mailer dimensions fall within the recommended guidelines to streamline the shipping process.


Infinite Pack offers a diverse selection of poly mailer bags, allowing you to find the perfect size for your e-commerce shipping needs. By considering the size of your product, selecting an appropriate mailer bag size, and factoring in cushioning and shipping specifications, you can optimize your packaging and save on shipping costs. Explore our collection of poly mailer bags on our website at and take advantage of our mailer size calculator for a hassle-free selection process. Shipping made simple with Infinite Pack - choose the right poly mailer bag size for your business today!

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