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USPS Mail Guide

This document provides a template and guidelines for checking the dimensional standards for mailpieces. It outlines the maximum dimensions for letters, postcards, and machinable sizes. Mailpieces must meet minimum size requirements of 3.5" height, 5" length, and 0.007" thickness to qualify as mailable. Larger pieces need to be at least 0.009" thick. The template can be used to check if a mailpiece meets dimensional and thickness requirements.

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Bo Ko
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306 views1 page

USPS Mail Guide

This document provides a template and guidelines for checking the dimensional standards for mailpieces. It outlines the maximum dimensions for letters, postcards, and machinable sizes. Mailpieces must meet minimum size requirements of 3.5" height, 5" length, and 0.007" thickness to qualify as mailable. Larger pieces need to be at least 0.009" thick. The template can be used to check if a mailpiece meets dimensional and thickness requirements.

Uploaded by

Bo Ko
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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LETTER - SIZE MAIL DIMENSIONAL STANDARDS TEMPLATE

Use this template to check:


• General Mailability: minimum required dimensions
• Postcard Rate: maximum dimensions Machinable Sizes:
• Letters: maximum dimensions To meet machinable requirements, the tip of the upper-
• Machinability: Size restrictions for First-Class Mail 1 ounce or less; right corner of the mailpiece must touch this shaded
Standard Mail 3.3 ounces or less area and meet the thickness standards (check for
maximum thickness by passing the piece through
the slot below). Mailpieces more than 4¼” high
or 6” long must be at least .009” thick
to be mailable.
6 1/8” - Maximum Letter Height

¼”
Maximum
Thickness
4¼” - Maximum Postcard Height

Minimum mailable dimensions for pieces ¼” thick or less:


3½” high, 5” long, .007” tick
To measure smaller thicknesses noted on this template,
3½” - Minimum Mailpiece Height

us a micrometer or consult a postal mailpiece design analyst.

First-Class Mail 1 ounce or less and Standard Mail 3.3 ounces or


less (other than Enhanced Carrier Route pieces) that are within
the dimensions on this template, but not within the machinable
aspect ration, will incur a nonmachinable surcharge. Aspect ratio
(length divided by height) must be at least 1.3 but no more
than 2.5.

First-Class Mail 1 ounce or less exceeding any letter-size


maximum dimension will incur nonmachinable surcharge.
Standard Mail 3.3 ounces or less exceeding any letter-size
To use this templat, place lower-left corner maximum dimension will incur postage at the nonletter rate.
of mailpiece here. See examples on reverse.

5” - Minimum Mailpiece Length


6” - Maximum Postcard Length
11½” - Maximum Letter Length

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