# 2026-00131: USPS to Fine Businesses for Guessing Package Sizes Starting July

2026-00131, Parcel Dimension Compliance, is a Federal Register proposed rule from Postal Service published 2026-01-08, effective 2026-07-12 (as of 2026-06-11).

- Canonical: https://policyrisk.com/federal-register/2026-00131
- As of: 2026-06-11
- Plain-text twin of the page above; the HTML and this file carry the same facts.

## Facts
- Document number: 2026-00131
- Title: Parcel Dimension Compliance
- Type: Proposed Rule
- Agencies: Postal Service
- Citation: 91 FR 651
- Published: 2026-01-08
- Effective: 2026-07-12
- Comments close: not stated
- Significant: no
- Touches household money: no
- Regulation identifier numbers: none
- Last updated: 2026-06-11

## In one line

USPS to Fine Businesses for Guessing Package Sizes Starting July

## Summary

Starting July 12, 2026, businesses sending Priority Mail and similar services must include exact parcel dimensions (length, width, height) in their shipping manifests—no more guessing! Flat Rate and USPS Returns are off the hook. If you don’t comply, you’ll face a Dimension Noncompliance Fee, so it’s time to measure up and avoid extra costs.

## Abstract

The Postal Service is proposing to amend Mailing Standards of the United States Postal Service, Domestic Mail Manual (DMM) in various sections to expand the current requirement to include accurate parcel dimensions in a manifest.

## Effects PRIA read

- Mandatory parcel dimensions on manifests: cost, medium. Starting July 12, 2026, businesses that send commercial Priority Mail Express, Priority Mail, USPS Ground Advantage--Commercial, or Parcel Select must include each parcel's exact dimensions (length, width, height) in the Shipping Services file manifest or other approved electronic documentation. Th…
- Dimension noncompliance fee applies more broadly: cost, medium. If a mailer omits or provides inaccurate parcel dimensions (length, width, height) or omits the required characteristics extra service code (ESC) in the manifest, the parcel will be assessed the Dimension Noncompliance Fee (see Notice 123--Price List). This enforcement applies for the same commerci…

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## Sources
- [2026-00131 on federalregister.gov](https://www.federalregister.gov/documents/2026/01/08/2026-00131/parcel-dimension-compliance)
- [2026-00131 as published (PDF)](https://www.govinfo.gov/content/pkg/FR-2026-01-08/pdf/2026-00131.pdf)

## Related
- [Previous: 2026-00119, Airworthiness Directives; Gulfstream Aerospace LP Airplanes](https://policyrisk.com/federal-register/2026-00119)
- [Next: 2026-00137, Airworthiness Directives; Airbus Helicopters](https://policyrisk.com/federal-register/2026-00137)
- [All Federal Register documents](https://policyrisk.com/federal-register)

Source: PRIA, https://policyrisk.com/federal-register/2026-00131 (as of 2026-06-11).