Federal Register #2026-06223

USPS Final Rule: Accurate Parcel Dimensions Required in Shipping Manifests

The United States Postal Service (USPS) has announced a final rule change impacting commercial mailers: - USPS is amending the Domestic Mail Manual (DMM) to require accurate parcel dimensions (length, width, height) in shipping manifests for: - Priority Mail Express - Priority Mail - USPS Ground Advantage - Parcel Select products - Flat Rate priced pieces and USPS Returns are excluded from this requirement - Implementation will occur in two phases: - Phase 1: Mailers must report accurate parcel dimensions in manifests - Phase 2: USPS will introduce automated accuracy checks and assess fees for noncompliance - The rule is designed to improve operational efficiency, capacity forecasting, and compliance - No OEMs, vendors, or specific products/services are being procured; this is a regulatory change, not a purchasing action

Description

The Postal Service is issuing a final rule amending the Mailing Standards of the United States Postal Service, Domestic Mail Manual (DMM) to require accurate parcel dimensions to be included in shipping manifests. This rule aims to improve operational efficiency, capacity forecasting, and compliance by expanding the current dimensional reporting requirements. The implementation will occur in two phases, with the first phase starting July 12, 2026, requiring accurate dimension reporting, and the second phase, tentatively in early 2027, introducing automated accuracy checks and fee assessments for noncompliance. The rule applies to commercial Priority Mail Express, Priority Mail, USPS Ground Advantage, and Parcel Select products, excluding Flat Rate and USPS Returns pieces.

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