Mail & Shipping Services

Domestic mail and shipping service product boxes sitting on a table.

Domestic mail and shipping service product boxes sitting on a table.

Compare USPS mail services by starting retail prices, delivery speed, and more. Most services automatically include USPS Tracking ® (except First-Class Mail ® service), and you can add insurance and extra services.

Save on Shipping: If you're using Priority Mail Express ® , Priority Mail ® , or USPS Ground Advantage ® service, you can ship online with enhanced Click-N-Ship ® service and get lower Commercial Rates. Businesses can get additional savings by opting in to the Business Rate Card.

Fastest Delivery Speed

Fast air delivery for your most important mail and packages (with some Flat Rate options).

You're sending something urgent that must arrive next-day or 2-day. 1 You need date-certain delivery with money-back guarantee. 2

Next-Day to 2-Day 1

Up to $100 insurance included 3 ; you can buy additional insurance coverage up to $5,000

You're sending important items that need to arrive in 1-3 business days. 4

Flat Rate Envelope: From $9.85

USPS Mailing Box (Flat Rate): From $10.40

Your Own Box By Weight/Zone: From $9.25

1-3 business days 4

Up to $100 insurance included 3 ; you can buy additional insurance coverage up to $5,000.

Simple, Affordable, Reliable

Save money shipping packages by ground.

Low rates for packages with expected delivery in 2-5 business days 5 (also the primary option for HAZMAT items that can't travel by air).

2–5 business days 5

Up to $100 insurance included 3 ; you can buy additional insurance coverage up to $5,000.

Postcards & Envelopes

Mail, like postcards, letters in small envelopes (up to 3.5 oz), and large envelopes (up to 13 oz).

You're sending a letter envelope (under 3.5 oz) or large envelope (under 13 oz) that's flat and bends easily.

From $0.56 (postcards)

From $0.73 (letters)

From $1.50 (large envelopes)

1-5 Business Days

Large Envelopes: 13 oz

No. (Delivery confirmation available if you add a service such as Certified Mail)

No for letters (unless you buy certain other add-on services.)

Go to the Post Office to ship heavier items like books and educational material.

You're sending only books (or other eligible media) and want the most affordable price.

2-8 Business Days 7

You can buy insurance for loss or damage up to $5,000 for merchandise only

Image of Priority Mail Express Boxes

Priority Mail Express

Next-Day to 2-Day Guarantee by 6 PM 2

Our fastest domestic shipping service, Priority Mail Express ® delivers 7 days a week, 365 days a year (with limited exceptions). Next-day delivery is available to most U.S. addresses and PO Box ™ 1 addresses with a money-back guarantee 2 . With our free Flat Rate Envelopes, you don’t need to weigh shipments 70 lbs and under. Purchase Priority Mail Express postage and shipping labels at a Post Office ™ location or online. Prices start at $30.45 at a Post Office. (Ship online with enhanced Click-N-Ship service and get lower Commercial Rates.)

Image of Priority Mail Express Boxes

Image of Priority Mail supplies.

Priority Mail

Shipping in 1–3 Business Days 4

Priority Mail ® is our bestselling mail service. Domestic deliveries arrive in 1-3 business days 4 depending on where your package starts and where it’s going. Tracking and insurance are included, shipping boxes and envelopes are free, and with Priority Mail Flat Rate ® , you don't need to weigh shipments 70 lbs and under. Purchase Priority Mail postage and shipping labels at a Post Office or online. Prices start at $9.25 at a Post Office. (Ship online with enhanced Click-N-Ship service and get lower Commercial Rates. Businesses can get additional savings by opting in to the Business Rate Card.)

Image of Priority Mail supplies.

Image of USPS Ground Advantage

USPS Ground Advantage

Shipping in 2-5 Business Days 5

USPS Ground Advantage ® is an affordable and reliable way to send packages up to 70 lbs inside the U.S. Packages up to 15.999 oz are priced by the ounce, rounded up to 4 oz, 8 oz, 12 oz, and 15.999 oz. Packages heavier than 15.999 oz are charged by the pound (rounded up). Prices start at just $5.00 at a Post Office. (Ship online with enhanced Click-N-Ship service and get lower Commercial Rates. Businesses can get additional savings by opting in to the Business Rate Card.)

Image of USPS Ground Advantage

Picture of First Class Stamps

First-Class Mail

Mail in 1–5 Business Days

First-Class Mail ® is an affordable mail service for standard-sized, single-piece envelopes weighing up to 3.5 oz and large envelopes weighing up to 13 oz. Prices start at $0.73 at a Post Office.

Picture of First Class Stamps

Media Mail

Shipping in 2–8 Business Days 6

Media Mail ® is a cost-effective way to send eligible books, media, and educational materials. You can only send certain types of media: If you try to include anything that’s not allowed, you (or your recipient) will have to pay higher postage rates. All Media Mail packages are subject to opening and inspection by the Postal Service. Prices start at $4.63 at a Post Office.

Using Media Mail

Here's what you can send:

NOTE: Video games, computer drives, and digital drives do not qualify for Media Mail prices.

Weight, Size, & Shape Requirements

See the full list of requirements and allowed items: Media Mail Eligibility Standards

(Note: Library Mail is a related service for eligible organizations, including schools, museums, nonprofits, and other groups.)

Additional Package Fees:

Example: You have a package that is 16” x 12” x 10” and weighs 5 lbs.

  1. Multiply length x width x height to get the volume of 1,920 cubic inches. That’s larger than 1 cubic foot (1,728 cubic inches), so you must divide by 166 to find its DIM weight: 1,920 divided by 166 equals 11.56, which rounds up to 12 lbs.
  2. The DIM weight of 12 lbs is greater than the actual package weight of 5 lbs. You must pay the postage as if the package actually weighs 12 lbs.

If you omit or give inaccurate dimensions and/or don’t pay the DIM weight rate (when it applies), you’ll pay a dimension-noncompliance fee of $1.50.

  1. For ground shipping via USPS Ground Advantage, you’ll pay more if your package measures:
  2. For expedited shipping (via Priority Mail Express or Priority Mail), you’ll pay more if your package measures:

For business shippers using Parcel Select® service, learn more about how to measure your package and what fees may apply.

TIP: Use the USPS ® Price Calculator tool to calculate your domestic postage costs. You'll need to know your package’s weight, shape, and size measurements.