Priority Mail, including Priority Mail Flat Rate shipping products, has fast shipping times (2-3 days) with flexible prices. Get free flat rate boxes and print postage labels online.

The Priority Mail Flat Rate® Medium Box is a quick, easy, and convenient way for you to ship USPS Priority Mail® packages.

If It Fits, It Ships®. Priority Mail® service offers a variety of Flat-Rate Boxes and Envelopes that ship for the same price to any domestic address, regardless of how much they weigh or how far they’re going. Prices vary by product, as shown in the table below.

The Priority Mail Flat Rate® Large Box is a quick, easy, and convenient way for you to ship Priority Mail® packages.

Your one stop shop for the best in shipping and mailing supplies for your Stamps.com account. Everything from boxes to bubbles mailers, envelopes and certified mail, to postage scales and thermal printers from brands like ProLabel, Dymo, ONYX Products, and Zebra.

Domestic deliveries arrive in 2-3 ... boxes and envelopes are free, and with Priority Mail Flat Rate®, you don't need to weigh shipments 70 lbs and under....

October 23, 2025 - One of the many benefits of shipping with USPS Flat Rate Boxes is that the boxes themselves are free. You can pick them up at any post office or USPS will actually ship the boxes to you for free. In order to have access to the USPS Priority Mail Flat Rate pricing, you must use one of USPS designated Flat Rate Boxes; you cannot use just any box of the same dimensions.

Priority Mail Shipping Supplies Boxes · Priority Mail Flat Rate® Small Box · Single, Pack of 10 or 25 · 8-11/16"(L) x 5-7/16"(W) x 1-3/4"(H) $0.00 · Priority Mail Flat Rate® Medium Box · Single, Pack of 10 or 25 · 11-1/4"(L) x 8-3/4"(W) x 6"(H) $0.00 ·

Shop our selection of Free Shipping Supplies Shipping Supplies on the USPS.com Postal Store

December 2, 2025 - USPS Flat Rate is a pricing model under Priority Mail® where you pay one flat fee to ship packages or envelopes of specific dimensions, regardless of weight (up to 70 lbs) or destination within the U.S. These USPS Priority Mail Flat Rate services ...

The USPS Priority Mail flat rate service allows you to ship packages anywhere in the U.S. in 1-3 business days for a single flat fee, regardless of weight (up to 70 pounds) or distance.

And like all USPS flat rate boxes and envelopes, the box is available free of charge and also can be used for international shipping.

Priority Mail® Forever Prepaid Flat Rate Large Box · Includes Customer's Return Address · 12-1/4"(L) x 12"(W) x 6"(H) $31.40 · Priority Mail® Forever Prepaid Flat Rate Side-Loading Medium Box · Includes Customer's Return Address · 14-1/8"(L) x 12"(W) x 3-1/2"(H) $21.95 ·

February 5, 2025 - USPS Flat Rate boxes offer fixed-cost shipping with no weight-based pricing, making them perfect for businesses and individuals.

To send packages to loved ones serving in the military and diplomatic posts abroad, the Postal Service offers a discounted price of $30.15 on its largest Priority Mail Flat Rate Box. The price includes a $1.25 per box discount for mail sent to APO/FPO/DPO (Air/Army Post Office/Fleet Post Office/Diplomatic Post Office) destinations worldwide.

October 9, 2025 - 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).

USPS postage rates offer low-cost mailing and shipping prices for domestic & international customers. See Forever postage stamp prices and other postage rates.