Effective January 24, 2021, the Postal Service™ will revise Mailing Standards of the United States Postal Service, International Mail Manual (IMM®), section 251.22, to clarify information about the dimensions for items other than rolls for First-Class Package International Service®.
Mailing Standards of the United States Postal Service, International Mail Manual (IMM)
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2 Conditions for Mailing
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250 First-Class Package International Service
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251 Description and Physical Characteristics
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251.2 Physical Characteristics and Standards — Packages (Small Packets)
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251.22 Dimensions — Other Than Rolls
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[Add new item e. to read as follows — because the article entitled “IMM Revisions: Changes to Pricing for International Shipping Services” in Postal Bulletin 22562 (12-31-20, pages 5–15) also had revisions to the items in 251.22 that are effective January 24, 2021, we are including items a. through e. for clarity:]
a. Minimum length: 6 inches.
b. Minimum height: 4 inches.
c. Maximum length: 24 inches. Length is the longest dimension.
d. Maximum length, height, and depth (thickness) combined: 36 inches.
e. The postage, address, customs form, and other required elements must appear on a side that meets the minimum length and height dimensions (6 inches x 4 inches).
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The Postal Service will incorporate this revision into the next edition of the online IMM, which is available via Postal Explorer® at pe.usps.com.
— Product Classification, Product Solutions, 1-14-21
