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#POSTAGE FOR 6X9 ENVELOPE MANUAL#
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It is rigid or contains odd-shaped items that result in nonuniform thickness.It has a delivery address parallel to the shorter dimension of the mailpiece.The aspect ratio (length divided by height) is less than 1.3 (such as square envelopes) or more than 2.5.The following are some common nonmachinable characteristics of First-Class Mail letters (up to 3.5 ounces): It does not apply to postcards eligible for the card rate, large envelopes, or packages. The $0.17 nonmachinable surcharge applies only to First-Class Mail letters (up to 3.5 ounces). In most cases, a letter-size mailpiece is classified and priced as a large envelope (flat) if it exceeds 3.5 ounces or 6-1/8" by 11-1/2" by 1/4" thick.
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Pay close attention to envelopes such as greeting cards marked “Extra Postage Required.” Please be aware of the minimums and maximums for First-Class Mail letters, large envelopes (flats), and packages to ensure that the correct postage is charged. The May 14, 2007, changes to First-Class Mail ® items emphasize the impact of mailpiece shape on postage. Getting It Right! Charging the Correct Postage for First-Class Mail Letter-Size Mailpieces
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