Short Answer
As of June 12, 2026, USPS says Phase One of an expanded parcel-dimension reporting requirement starts on July 12, 2026. The Postal Bulletin language is about accurate dimensions in manifests for specified commercial USPS products, not a blanket panic rule for every retail package a seller might mail.
For a small seller, the practical move is simple: measure the finished package, keep dimensions beside weight in your label workflow, and verify what your marketplace or shipping software asks for before buying the label.
Who This Is For
This is for sellers using USPS labels through marketplaces, shipping software, or commercial postage workflows. You might sell on eBay, Etsy, Shopify, or another platform and suddenly notice that dimensions feel more important than they used to.
It is also for sellers who heard about a dimension noncompliance fee and are trying to decide whether they need a new scale, new boxes, new software, or a calmer label routine. Start with the routine.
What USPS Says Is Changing
USPS Postal Bulletin 22700 says the Postal Service is expanding the requirement that mailers include accurate parcel dimensions in a manifest. The listed dimensions are length, width, and height.
The bulletin says the expanded standard applies to these commercial products:
- Priority Mail Express.
- Priority Mail.
- USPS Ground Advantage.
- Parcel Select.
It also says dimensions are not required for Flat-Rate-priced pieces or USPS Returns pieces.
What Phase One Means For A Small Seller
Phase One begins July 12, 2026. USPS says Phase One is for evaluating data, reviewing customer activity, identifying thresholds, and testing trusted systems’ accuracy.
The important point: USPS says assessment of the expanded Dimension Noncompliance fee for omitted or inaccurately reported dimensions is deferred until Phase Two. USPS describes Phase Two as tentatively scheduled for early 2027 and subject to change.
That does not mean dimensions are optional in every situation. USPS also says it will continue to charge the existing Dimension Noncompliance fee during Phase One for parcels that exceed 1 cubic foot or 22 inches in length when dimensions are omitted or inaccurate in the manifest.
Seller Translation
| USPS Language | What It Means For Your Station | Better Move |
|---|---|---|
| Accurate dimensions | Do not guess length, width, and height from memory. | Measure the packed parcel. |
| Manifest | This is mainly about commercial/electronic documentation workflows. | Watch what your label platform asks for. |
| Phase One | USPS is starting the expanded reporting requirement and evaluating data. | Add measurement to the routine now. |
| Phase Two | Fee automation details are still tentative and subject to change. | Recheck USPS and platform rules before making permanent SOPs. |
| Flat-Rate and Returns exclusions | Not every package type is treated the same. | Do not overgeneralize the rule. |
What To Do Before July 12, 2026
- Put a tape measure or reliable ruler at the packing station.
- Measure the finished package after it is closed.
- Record length, width, and height in the same place you record weight.
- Check your marketplace or shipping software label screen before buying postage.
- Pay special attention to larger boxes, bulky lightweight packages, and packages near size thresholds.
- Recheck official USPS guidance if you are writing internal instructions for a team or repeat workflow.
This is not a reason to buy every box size again. It is a reason to stop guessing package dimensions.
Common Mistakes
Treating the July date like a universal fee start
USPS says Phase One starts July 12, 2026, but the expanded fee assessment is deferred until Phase Two. The bulletin also says Phase Two timing is tentative and subject to change.
Better move: separate the reporting requirement from the later fee-automation phase.
Assuming retail counter packages and commercial manifests are the same thing
The Postal Bulletin language is about parcel dimensions in manifests for specified commercial products. Small sellers often buy labels through marketplace or shipping software workflows, so the label provider’s fields matter.
Better move: follow the fields in your actual label workflow and verify current USPS/platform instructions.
Panic-buying packaging before measuring current orders
Buying new boxes before measuring your real finished packages can create the same problem in a new supply pile.
Better move: measure your common finished packages first, then decide whether any packaging sizes actually need to change.
Waiting until label time to find the tape measure
If dimensions are a label field, measurement cannot live in a junk drawer.
Better move: keep the measuring tool beside the scale.
Related Guides
- Use How to Measure Package Dimensions for Shipping Labels for the step-by-step workflow.
- Use Mailer Size Charts if package size selection is still the hard part.
- Use Postal Scale Buying Guide if weight is the other label-field problem.
Final Next Step
Before July 12, 2026, pack three normal orders, measure the finished parcels, and compare those dimensions with what your label platform asks for. That small habit is more useful than guessing, ignoring the fields, or buying supplies before you know what changed.