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  A Customer's Guide to Mailing
   
  Introduction
  What Are You Mailing
  Choosing a Service for Mailing
  Adding Extra Services
  Examples of Smart Choices
  Addressing Your Mail
  Preparing Packages
  Sending and Receiving Mail
  Domestic Prices
  Other Products and Services
  Tips for Frequent Mailers and Small Businesses
  International Prices
     
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What Are You Mailing?
   
 

Knowing the shape of your mail determines the price you will pay.

This picture shows a postcard.

This picture shows a letter.

This picture shows a large envelope.

This picture shows a package.

Postcard
Rectangular cardstock mailpiece not contained in an envelope

Letter
Small rectangular mailpiece no thicker than 1/4 inch

Large Envelope
Flat rectangular mailpiece no thicker than 3/4 inch

Package
A three-dimensional mailpiece contained in a box, thick envelope, or tube, weighing up to 70 pounds

See price charts.

Mailpiece Dimensions

SHAPE   LENGTH HEIGHT
Postcard minimum
maximum
5 inch min.
6 inch max.
3-1/2 inch min.
4-1/4 inch max.
Letter
(up to 3.5 ounces)
minimum
maximum
5 inch min.
11-1/2 inch max.
3-1/2 inch min.
6-1/8 inch max.
Large Envelope minimum*
maximum
11-1/2 inch min.
15 inches
6-1/8 inch min.
12 inches
Package Weight cannot exceed 70 pounds.
Length + girth (distance around the thickest part of the package) cannot exceed 108 inches. (Parcel Post cannot exceed 130 inches.)

* Large envelopes exceed one or more letter-size maximum dimensions.

Some Shapes, such as tubes and square envelopes, may require additional
postage. Postcards, letters, large envelopes and packages pay different prices.

Click-N-Ship® Services
Click-N-Ship brings the Post Office to your desktop at home or at the office with no additional fees. See Addressing Your Mail, Online Shipping Labels, for more information.

Carrier Pickup™
The Postal Service makes shipping your packages quick and convenient. Carrier Pickup is available with Express Mail, Priority Mail, and international package services. Just prepare your package before your letter carrier arrives—including postage—and your letter carrier will pick it up for you.