Priority Mail

1-3 Business Days1 & Flat Rate Pricing2

Priority Mail® service includes tracking and delivery in 1-3 business days1. Check delivery time estimates on the Priority Mail Delivery Map. Priority Mail Flat Rate® lets you ship packages up to 70 lbs to any state at the same price. Ship from Post Office locations or from your home or business with Click-N-Ship® service. Prices start at $7.95.

Ship Now with Priority Mail Priority Mail Express® Next Day

ALERT: As a result of the ongoing COVID-19 emergency, certain packages may take longer than usual to arrive. Priority Mail Express next-day service is unaffected. Learn More

Features & Pricing

  • Fast delivery time: 1-3 Business Days1
  • Free Package Pickup3 service at your home or office
  • Includes USPS Tracking®4 and up to $50 of insurance5 with most shipments6 (restrictions apply)
  • No surcharges for fuel; resident or rural delivery; or Saturday7 delivery
  • Flat Rate, regional, and prepaid pricing (retail only) available
  • Prepaid Forever Priority Mail Flat Rate. Except for Priority Mail Flat Rate packaging, Priority Mail prices are based on weight and zone. With Prepaid Forever Priority Mail Flat Rate, you get the same Flat Rate pricing with the added convenience of Forever postage.

Weight, Size, & Shape Requirements

  • Maximum weight is 70 lbs.
  • Maximum combined length and girth (girth is the distance around the thickest part) is 108″.
  • When sealing a Flat Rate Envelope or Box, the container flaps must be able to close within the normal folds.

How to Prepare a Package

Additional Information

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Mailing Restrictions & Prohibitions

There are specific regulations and standards for mailing restricted, prohibited, and hazardous materials, including cigarettes and smokeless tobacco.

Domestically Restricted & Prohibited Items

Learn more about what items you may and may not mail within the U.S.

Domestic Shipping Prohibitions & Restrictions

Shipping to a Military Post Office (APO/FPO/DPO)

You'll pay domestic prices for packages shipped to a Military Post Office (APO/FPO/DPO), but these destinations require a customs forms and have specific restrictions.

Military & Diplomatic Mail

Learn more about how to send mail and packages to loved ones overseas.

Sending APO/FPO/DPO Mail

For Businesses

USPS understands what's most important to our business customers: speed, affordability, security, and customer service. We help businesses provide these services and resources to your customers at discounted rates.

Priority Mail Regional Rate

Priority Mail Regional Rate® offers a low-cost shipping option for commercial and online customers who use Priority Mail® service and who regularly send small, dense packages short distances. Get the speed and convenience of Flat Rate shipping with regional pricing to reduce your costs.

  • Order free Regional Rate Boxes A and B online. (Please note Regional Rate Box C was discontinued.)
  • Choose from 2 box sizes to fit the item you’re sending.

Priority Mail Open & Distribute

Expedite the transportation of your bulk mailings with Priority Mail Open & Distribute® (PMOD). Customers using PMOD services ship their items in an approved USPS container to an authorized location where USPS opens the container before delivering the contents to their final destinations.

  • Prices are commercial rates based on weight and zone to quickly move your mailings at a reasonable cost.
  • Mailings include a special barcoded label, so you can easily track your shipments.

Priority Mail Open & Distribute

Helpful Links

Priority Mail Flat Rate Products

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Free Supplies8 Shipping Price Dimensions Great For…
Flat Rate Envelope

$8.15 Commercial Base

$8.70 at Post Office & Online

12 1/2″ x 9 1/2″

Passports & Passport Applications



Window Flat Rate Envelope

$8.15 Commercial Base

$8.70 at Post Office & Online

10″ x 5″

12 1/2″ x 9 1/2″

Pre-addressed Envelopes

Small Flat Rate Envelope

$8.15 Commercial Base

$8.70 at Post Office & Online

10″ x 6″

Small Documents

Oversized Greeting Cards

Gift Cards

Padded Flat Rate Envelope

$8.75 Commercial Base

$9.30 at Post Office & Online

12 1/2″ x 9 1/2″



Boxed Jewelry

Legal Flat Rate Envelope

$8.45 Commercial Base

$9.00 at Post Office & Online

15″ x 9 1/2″

Legal Documents

Small Flat Rate Box

$8.65 Commercial Base

$9.20 at Post Office & Online

Outside: 8 11/16″ x 5 7/16″ x 1 3/4″

Inside: 8 5/8″ x 5 3/8″ x 1 5/8″


Small Electronics

Medium Flat Rate Box — 1 (top-loading)

$14.50 Commercial Base

$16.25 at Post Office & Online

Outside: 11 1/4″ x 8 3/4″ x 6″

Inside: 11″ x 8 1/2″ x 5 1/2″

Office Supplies


Medium Flat Rate Box — 2 (side-loading)

$14.50 Commercial Base

$16.25 at Post Office & Online

Outside: 14″ x 12″ x 3 1/2″

Inside: 13 5/8″ x 11 7/8″ x 3 3/8″

Office Supplies


Large Flat Rate Box

$20.05 Commercial Base

$22.65 at Post Office & Online

Outside: 12 1/4″ x 12 1/4″ x 6″

Inside: 12″ x 12″ x 5 1/2″





APO/FPO/DPO Flat Rate Box

$18.55 Commercial Base

$21.15 at Post Office & Online

Outside: 12 1/4″ x 12 1/4″ x 6″

Inside: 12″ x 12″ x 5 1/2″

Sending Gifts to Troops

Large Flat Rate Board Game Box

$20.05 Commercial Base

$22.65 at Post Office & Online

Outside: 24 1/16″ x 11 7/8″ x 3 1/8″

Inside: 23 11/16″ x 11 3/4″ x 3″

Board Games

Prepaid Forever Priority Mail Flat Rate® Packaging

$8.70 at Post Office & Online

Various Sizes Available

Various Options

1. In most cases, the expected delivery date printed on your receipt or provided at checkout will reflect a delivery time of 1, 2, or 3 business days and is based on origin, destination, and drop-off time. The expected delivery data does not come with a money-back guarantee. Back ^ to legal disclaimer 1
2. For mailable items up to 70 lbs. Back ^ to legal disclaimer 2
3. For details on free Package Pickup, visit Schedule a Pickup. Back ^ to legal disclaimer 3
4. Excludes Prepaid Forever Priority Mail Flat Rate products. Back ^ to legal disclaimer 4
5. Available only for certain products and to certain destinations. Restrictions and exclusions apply. Insurance does not cover certain items. For details, visit 609.4.3 (Non-payable Claims), 609 (Filing Indemnity Claims for Loss or Damage), and 503.4 (Insured Mail) of the Domestic Mail Manual. Back ^ to legal disclaimer 5
6. To qualify for included insurance, Priority Mail domestic shipments must have the applicable USPS tracking barcode. Insurance is not included for Priority Mail shipments sent using Priority Mail Open & Distribute, Premium Forwarding Service-Residential or Premium Forwarding Service-Commercial. For shipments valued at more than $50, additional insurance may be available for purchase. When additional insurance is purchased, it replaces the included insurance. Back ^ to legal disclaimer 6
7. If Saturday is a national holiday, Priority Mail Express service may be available for an added fee.Back ^ to legal disclaimer 7
8. Boxes and envelopes are delivered with your regular mail usually within 7 to 10 business days. Back ^ to legal disclaimer 8