Choosing the right poly bag size is important. Your poly bag must be large enough to fit your product properly, to be a viable protection against dirt, debris, and moisture. On the other hand, you don’t want to use a poly bag that has more material than you need, or you risk generating unnecessary waste and extra costs. How do you know what size poly bag you need? 

To find what size poly bag you need, follow these steps:

  1. Measure your product
  2. Find your poly bag measurements
  3. Understand the different poly bag types
  4. Confirm size with the proof 

Let’s break these steps down further, so you can figure out exactly what size poly bag you need for your product.

#1 Measure Your Product

For packaging purposes, you’ll need to measure your product or bag contents to find what size poly bag will work best. You can find your product’s dimensions by taking quick measurements of your product’s length and width, and depth if applicable.

Your product will also determine the type and style of bag you need. For example, if your product is flat and two-dimensional, a simple flat poly bag will best serve your needs and comes in standard measurements. However, if your product is three-dimensional or a nonstandard shape, you’ll need a poly bag that can fit around it and cover all parts of the product. For oddly shaped items, measure the space the product will take up in the bag, from the widest points, in order to find the minimum size bag you need.

If you’re looking for a poly bag to fit in your product, such as a drum liner. These measurements will be different than the length, width, and depth of the container — drum liners are measured in gallons. However, length and width calculations can be converted to express capacity in gallons easily using a bag guide.

#2 Measure Your Poly Bag

When making measurements of a poly bag, be sure to measure the space where your product will be. To fit your product, the dimensions of the bag must be greater than those of what you want it to enclose. What size poly bag you’ll need will be the one that fits your product comfortably, and will be easy to handle for packaging and shipping.

It’s important to also consider the fit of the bag around your product. If you want the bag to fit loosely, add a few inches to the dimensions. A loose fit will ensure the product fits in the packaging in any direction or arrangement. Too tight of a fit could stretch or tear the poly bag, which could be a concern if your product has blunt or sharp edges.

#3 Understand Different Poly Bag Types

Poly bags come in a range of sizes, uses, and constructions, so it’s important to understand that different poly bags will require different measurements and ordering procedures. Here are a few examples of common types of poly bags:

  • Flat Poly Bags: Standard flat poly bags are available in a wide range of sizes with straightforward measurements — just length and width.
  • Gusseted Poly Bags: The sides of this bag type can expand to allow for a more fitted shape. For gusseted bags, in addition to length and width, be sure to also measure the desired depth when at full capacity.
  • Bags on a Roll: Flat poly bags are often sold on a roll of uniform bags attached with perforated edges end-to-end. For each roll, the total roll length is the combined lengths of the bags. The width of the bags will be the same as the roll. 

Also, be aware that some bags have extra material at the top for handles, sealing options, etc. This part of the bag is not included in the overall measurement. The dimensions for your bag will cover the size of the bag pouch up until the bottom of these features. Keep this in mind when you’re measuring what size poly bag you need, and also that your poly bags will take up more space than just the basic pocket size.

#4 Confirm Size With the Poly Bag Proof

When ordering your poly bags, it’s always a good idea to talk with your supplier about what size poly bag they think will best meet your needs. During the poly bag ordering process, your supplier should develop a poly bag proof — a sample of your bag that meets your exact specifications and design requirements. You can use this proof to confirm that your product will fit comfortably inside the bag, to make sure you’ve got the right size before production begins.

Not sure what size poly bag you need? Talk to one of the experts at A-Pac Manufacturing. We’re happy to help you figure out the best size for your product. Also, check out our free guide for How to Choose the Right Poly Bags.

How to Choose the Right Poly Bag to fit your needs cta