Build A Bag

From Requirements to Spec In Minutes

Use this page as a practical checklist. Share what you know, and we’ll help finalize the spec for manufacturing and quoting.

  • Dimensions
  • Material
  • Thickness
  • Printing
  • Configuration
  • Performance
Build A Bag packaging example
Measurement guide

How to measure for polyethylene bags

Image-forward cards that flip on hover to reveal measurement steps and a quote button.

Measuring a Box

  1. Measure the width, depth, and height of the box to be lined. The depth is the shortest side.
  2. Add 1 inch to the width and 1 inch to the depth of the box to determine the width and depth of the bag. For the length of the bag, add the depth + height + 7 inches.
  3. If you plan to tie off the bag, add 10 to 12 inches to the length.
  4. Example: An 18” width × 14” depth × 16” height box would use a 19” width × 15” depth × 37” length liner.
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Measuring a Round Container

  1. Measure the diameter and the height of the container to be lined.
  2. To determine the circumference, multiply the diameter by 3.14.
  3. To determine the width of the bag, divide the circumference by 2 and add 1 inch for a looser fit.
  4. To determine the length of the bag, add the diameter to the height, then add 5 inches for overhang.
  5. Example: A 14” diameter × 30” height container would use a 23” width × 47” length bag.
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Measuring a Square Container

  1. Measure the width, depth, and height of the container to be lined.
  2. To determine the width of the bag, add the width + the depth + 2 inches for a looser fit.
  3. To determine the length of the bag, add half the depth to the height, then add 5 inches for overhang.
  4. Example: A 16” width × 12” depth × 36” height container would use a 30” width × 46” length bag.
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Measuring a Pallet Cover

  1. Measure the width, depth, and height of the pallet to be covered.
  2. Add 2 inches to the width and depth of the pallet to determine the cover size.
  3. Determine the length by adding half the depth to the height.
  4. Example: A 40” width × 37” depth × 50” height pallet would use a 42” width × 39” depth × 70” length cover.
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How it works

A step-by-step spec process

The best quote starts with the right questions. Here’s what we typically need to confirm to manufacture a consistent, repeatable poly bag solution.

1) Dimensions & fit

Provide width × length (and depth if gusseted). If the product has sharp edges or irregular shape, share photos or tolerances so we can recommend an appropriate fit.

2) Material & performance needs

Let us know if you need clarity, stiffness, puncture resistance, or chemical resistance. We’ll recommend polyethylene options aligned to your application.

3) Thickness (gauge)

Thickness impacts durability and cost. Tell us how the bag is handled (manual vs automated, abrasion, weight) and we’ll help dial in the right gauge.

4) Bag style & configuration

Flat, gusseted, side-weld, bottom-seal, etc. Add closures, vent holes, perforations, or specialty features based on your workflow.

5) Printing & identification

Add logos, handling instructions, warnings, barcodes, or compliance marks. We’ll confirm print requirements and placement based on your packaging process.

6) Quantity, packaging, and timeline

Share estimated volumes, order cadence, and required delivery windows. If you’re switching suppliers, tell us what isn’t working today—we’ll address it in the spec.

Helpful notes

Quick FAQ

Short answers to the most common questions we hear during bag specification.

What if I don’t know the exact thickness?
That’s common. Describe the product weight, handling conditions, and durability requirements. We’ll propose a gauge range and send options.
Can you help convert an existing bag to a better spec?
Yes. Share a sample or current dimensions/thickness. We’ll review for performance and cost opportunities while keeping the end use intact.
Do you support printed bags?
Yes. We do random print and registered print up to 10 colors, process and screen printing available.
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