If your products are sold through Amazon and require over-box packaging, ISTA just released a significant technical update to the ISTA 6-Amazon.com-Over Boxing test procedure, effective March 2026. This is a substantive revision driven by real Amazon fulfillment data, and it could directly affect how your packaging needs to be configured and tested.
Here’s what changed with the March 2026 ISTA 6-Amazon.com Over Boxing update and why it matters.
What Is ISTA 6-Amazon.com-Over Boxing?
When Amazon places your retail product into one of its own corrugated master shipping container often alongside other products and protective dunnage — the package must meet the ISTA 6-Amazon.com-Over Boxing standard. This Amazon ISTA 6 testing method was created to determine the ability of a package to protect its product while inside a master box, and it covers e-commerce fulfillment for individual retail packaged products weighing 70 pounds or less. Amazon packaging testing covers the shocks, drops, and vibrations that packages encounter throughout Amazon’s fulfillment system.
ISTA 6-Amazon packaging certification is required, and packaging testing must be conducted at an Amazon APASS-approved laboratory like WESTPAK.
What Changed in the March 2026 ISTA 6-Amazon.com-Over Boxing Update?
This revision was made in response to a member-submitted protocol change request and touches four key areas of Amazon package testing certification:
1. Dunnage — New Specifications, New Math
This is one of the most operationally significant changes. The dunnage specification was updated to reflect current internal Amazon practices:
- Kraft paper is now the standard.
- Air pillows have been removed as an allowable option.
- Key takeaway: If you’ve been relying on air pillow configurations in your test setup, that’s no longer valid.
Beyond Amazon packaging material, the calculation method has been formalized. The required quantity of paper dunnage is now determined using an equation that accounts for:
- Product volume
- Available void space within the over box
- Calculation examples are included to support consistent application of the methodology.
Additionally, visual guidance was developed to illustrate the preparation and placement of paper dunnage, reflecting Amazon’s internal fulfillment best practices. This is a welcome move toward consistency across labs — and a heads-up that your test setup must now mirror these specifications precisely.
2. Hazardous Products & Over Box Dimensions — Updated Based on Real Order Data
Amazon went back to its own customer order history to drive these ISTA 6 packaging test changes. Updated dimensions and weights for hazardous products were adopted based on findings from that analysis.
On the Amazon packaging certification side, over box dimensions were updated to reflect a subset of boxes currently utilized by Amazon, providing a representative view of commonly used box sizes — though the revised list does not include all available sizes.
3. Sample Size — More Combinations, More Testing
This ISTA 6-Amazon.com packaging certification change has real cost and scheduling implications. Order history was reviewed to assess not only item size and weight, but also the typical product mix within multi-item orders. This analysis indicated a broader variety of multi-product combinations, resulting in additional configurations requiring evaluation.
In plain terms: more SKU combinations may now need to be tested. If you sell multiple products that are commonly ordered together and shipped in the same over box, your testing scope may have expanded.
4. Editorial & Formatting
Grammar, style, and formatting were reviewed and updated to improve readability and overall document quality. Less exciting, but important for ensuring labs and suppliers are interpreting the procedure consistently.
The Clock Is Ticking After the ISTA 6-Amazon.com-Over Boxing Update
ISTA’s policy is to accept a test report based on a previous version of a procedure for up to one year after the revision is published. That means test reports generated under the prior version of the Over Boxing standard have a limited runway. If your current certification was conducted under an older protocol, now is the time to assess your exposure and plan for retesting.
Why Do 3rd Party ISTA 6 Testing?
The practical impact of this update varies depending on your product category, dunnage approach, and the range of products you sell on Amazon. Some suppliers may need minimal adjustments; others may be looking at a significantly expanded test program.
The best first step is a conversation with a packaging testing expert at an ISTA 6 test lab who knows the Amazon APASS ecosystem inside and out.
Contact WESTPAK today for ISTA6-Amazon.com Packaging Certification & Testing.
At WESTPAK, we’ll walk you through exactly how the March 2026 revision to ISTA 6-Amazon.com-Over Boxing affects your specific products, help you understand what needs to be retested, and get your program on track — efficiently and without surprises.
Ready to talk? Reach out to the WESTPAK team and let’s make sure your packaging keeps pace with Amazon’s evolving requirements.