The following table describes various mail and package types. For the most up-to-date and complete domestic and international mailing information, see the USPS website, the USPS Postal Explorer website, or your USPS postal representative.
| Type | Description |
|---|---|
|
Postcard
|
Minimum size of 5 × 3-1/2 × 0.007 inches. Maximum size of 6 × 4-1/4 × 6 × 0.016 inches.
|
|
Envelope (Letter)
|
Minimum size of ×x 3-1/2 ×0.007 inches. Maximum size of 11-1/2 ×6-1/8 × 1/4 inches.
|
|
Priority Mail Express International Legal Flat Rate Envelope
|
Size of 15 × 9 ½ inches.
|
|
Priority Mail Express Legal Flat Rate Envelope
|
Size of 15 × 9 ½ inches. Available to retail and Commercial Base™.
|
|
Large Envelope (Flat)
|
Minimum size of 11-1/2 ×6-1/8 ×1/4 inches. Maximum size of 15 ×12 × 3/4 inches.
|
|
Flat-Rate Envelope
|
Size of 12.5 × 9.5 inches. US Postal Service-supplied Priority Mail or Priority Mail Express envelopes.
|
|
Flat-Rate Padded Envelope
|
Size of 12.5 × 9.5 inches. US Postal Service-supplied Priority Mail only. Only available to qualified Commercial Plus customers.
|
|
Small Flat-Rate Box
|
Size of 8-5/8 × 5-3/8 × 1-5/8 inches. US Postal Service-supplied Priority Mail and Priority Mail International boxes.
|
|
Medium Flat-Rate Box (FRB-1)
|
Size of 11 × 8-1/2 × 5-1/2 inches. US Postal Service-supplied Priority Mail, and Priority Mail International.
|
|
Medium Flat-Rate Box (FRB-2)
|
Size of 13-5/8 × 11-7/8 × 3-3/8 inches. US Postal Service-supplied Priority Mail, and Priority Mail International boxes.
|
|
Large Flat-Rate Box
|
Size of 12-1/4 × 12-1/4 × 6 inches. US Postal Service-supplied Priority Mail and Priority Mail International boxes. |
|
Package (Rectangular)
|
Parcels over a 1/4 inch thick and less than 108 inches in combined length and girth (or 130 inches for Retail Ground (formerly known as Standard Post) and Parcel Select Ground).
Available in only certain cities, a pilot (test) USPS service called Metro Post is available for use with the Package (Rectangular) package type. For more information, see the USPS Metro Post website.
Tip! You can optionally hide the displayed price of postage using the Stealth Postage feature, available only to Endicia Premium or higher service account subscribers. |
|
Package (Non-rectangular)
|
Parcels that are not rectangular in shape, such as tubes, rolls, and other oddly shaped items. Also use for USPS-supplied Small Mailing Tubes and Medium Mailing Tubes.
|
|
Priority Mail Flat Rate Gift Card Mailer
|
Size of 10 × 7 inches.
|
|
Priority Mail Flat Rate Large Board Game Box
|
Size of 23-11/16 × 11-3/4× 3 inches.
|
|
Priority Mail International Legal Flat Rate Envelope
|
Size of 15 × 9 ½ inches.
|
|
Priority Mail International Padded Flat Rate Envelope
|
Size of 15 × 9½ inches.
|
|
Priority Mail Legal Flat Rate Envelope
|
Size of 15 × 9½ inches. Is no longer weight and zone based. Available to retail & Commercial Base customers.
|
|
Priority Mail Padded Flat Rate Envelope
|
Size of 12 ½ ×9½ inches. Available to retail & Commercial Base customers.
|
|
Priority Mail windowed envelope
|
Size of 5 × 10 inches
|
|
Regional Flat Rate Box A
|
Uses zone pricing and is not weight based, but different maximum weights apply for domestic and international. Uses US Postal Service® provided packaging only. Sizes:
Maximum weight US domestic: 15 lbs Maximum weight international: 10 lbs
|
|
Regional Flat Rate Box B
|
Uses zone pricing and is not weight based, but a maximum weight applies. Uses US Postal Service® provided packaging only. Sizes:
Maximum weight US domestic and international: 20 lbs
|
|
Small Priority Mail envelope
|
Size of 6 × 10 inches
|
See Also
International Mail and Shipment Topics
Getting Started: Print Labels Through the Design Tab
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