Enjoy fast, simplified, and reliable shipping with Priority Mail Flat Rate® from USPS. Ship packages and envelopes up to 70lbs anywhere in the country. Get a specific package type and pay one flat rate, regardless of weight or distance.
Flat Rate Envelope
12 1⁄2″ x 9 1⁄2″
up to 70 lbs.
$9.85
$7.99
Documents, Passports, Manuscripts
Legal Flat Rate Envelope
15″ x 9 1/2″
up to 70 lbs.
$10.15
$8.27
Legal papers
Padded Flat Rate Envelope
12 1⁄2″ x 9 1⁄2″
up to 70 lbs.
$10.60
$8.74
Books, Clothing, Boxed jewelry
Small Flat Rate Box
8 11⁄16″ x 5 7⁄16″ x 1 3⁄4″
up to 70 lbs.
$10.40
$8.51
Brochures, Small electronics
Medium Flat Rate Box – Top Loading
11 1⁄4″ x 8 3⁄4″ x 6″
up to 70 lbs.
$18.40
$14.38
Shoes, Office supplies
Medium Flat Rate Box – Side Loading
14″ x 12″ x 3 1⁄2″
up to 70 lbs.
$18.40
$14.38
Shoes, Office supplies
Large Flat Rate Box
12 1⁄4″ x 12 1⁄4″ x 6″
up to 70 lbs.
$24.75
$19.51
Gifts, Laptop, Computers
APO/FPO Large Box
12 1⁄4″ x 12 1⁄4″ x 6″
up to 70 lbs.
$24.75
$17.70
Care packages to troops
Regular, Legal, and Padded
Flat Rate pricing allows you to ship packages to any domestic address at a fixed price, regardless of weight (up to 70 lbs) or distance. You must use designated USPS Flat Rate packaging (envelopes or boxes). This eliminates the need to weigh packages or calculate shipping costs based on distance.
USPS offers several types of Flat Rate boxes for Priority Mail, including small, medium, and large sizes, as well as padded and legal flat rate envelopes. These boxes allow you to ship items up to 70 lbs to any state at a flat rate price, regardless of weight or distance within the US.
USPS Priority Mail Flat Rate tracking works by providing a unique tracking number for each shipment, allowing both the sender and recipient to monitor its progress through the USPS system. This tracking information is updated in real-time as the package moves through different USPS facilities and is scanned at each stage.
Flat rate shipping delivery times vary depending on the carrier and service selected, but generally range from 1 to 5 business days for domestic shipments. USPS Priority Mail Flat Rate is typically 1-3 business days. UPS Simple Rate offers various speeds, including within 5 days, within 3 business days, second day, and next day. FedEx One Rate also provides different delivery speeds, including next day, 2-day, and 3-day options.
Flat rate pricing is a pricing strategy where a business charges a single, fixed price for a specific product or service, regardless of the time or resources required to complete the job. This provides customers with upfront cost clarity and can simplify the billing process.
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