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USPS Store
store.usps.com › store › results › priority-mail › shipping-supplies-boxes › _ › N-p52cprZu9qwm0
Boxes | Priority Mail | USPS.com
21 and Above (13) Filter products based on price ranges. $0 only (19) $11 to $20 (1) $21 to $50 (4) 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 ·
Discussions

USPS Priority Mail Medium Flat Rate Box is $16.65
I use Pirateship to ship games being sold/traded. USPS Ground is a boon if you have a box. USPS Priority Mail is cheaper than getting the label direct from USPS. More on reddit.com
🌐 r/hexandcounter
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13
January 20, 2025
USPS Priority Mail vs USPS Priority Mail Large Flat Rate Box
If you use the large flat rate box you need to pay the large flat rate price. More on reddit.com
🌐 r/Ebay
16
9
January 1, 2019
USPS Priority vs. Flat Rate
What were they charged? If they were charged $16, ship the $8 and refund the difference is what I would do. More on reddit.com
🌐 r/Etsy
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0
December 7, 2023
2021 USPS Priority Mail Price Increases.. starts Jan 24th, 2021. Update your listings!
Someday it will get to the point that FedEx and UPS will be cheaper then USPS More on reddit.com
🌐 r/Ebay
70
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May 15, 2020
People also ask

How does USPS Priority Mail Flat Rate tracking work?
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.
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stamps.com
stamps.com › home › usps › usps priority mail flat rate®, flat rate boxes
Official Discounts on USPS Priority Mail Flat Rate® Prices
What are the different types of Flat Rate Boxes
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.
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stamps.com
stamps.com › home › usps › usps priority mail flat rate®, flat rate boxes
Official Discounts on USPS Priority Mail Flat Rate® Prices
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USPS Store
store.usps.com › postal store › shipping supplies › priority mail flat rate® large box
Priority Mail Flat Rate® Large Box | USPS.com
It features predetermined rates regardless of weight (domestically) or destination, similar to our other Flat Rate products. This item ships in singles, and packs of 10 or 25 boxes.
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USPS
about.usps.com › postal-bulletin › 2008 › html › pb22226 › html › kit_004.html
Fact Sheet: Priority Mail Large Flat-Rate Box
Postal Bulletin 22226 > New Priority Mail and Express Mail Shipping Initiatives FieldInformation Kit > Fact Sheet: Priority Mail Large Flat-RateBox · Note: The APO/FPO Flat-Rate Box is intended for use only to APO/FPO addresses; however, retail employees will not refuse these boxes if presented ...
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Stamps.com
stamps.com › home › usps › usps priority mail flat rate®, flat rate boxes
Official Discounts on USPS Priority Mail Flat Rate® Prices
October 9, 2025 - 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 ...
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ShipStation
shipstation.com › home › usps flat rate boxes, envelopes, and prices
USPS Flat Rate Boxes, Envelopes, and Prices
2 weeks ago - USPS Flat Rate packaging includes standardized boxes and envelopes that let you ship up to 70 lbs at one flat rate. Prices are fixed regardless of weight or destination within the U.S.—just make sure to use the proper Priority Mail Flat Rate label.
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GoShippo
goshippo.com › blog › usps-flat-rate-box-sizes-prices-how-it-works
USPS Flat Rate Boxes: Complete Size & Pricing Guide
USPS Priority Mail Flat Rate boxes are great for e-commerce. We explain USPS Flat Rate box sizes, prices, discounts, and how they works.
Find elsewhere
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Amebaownd
mopydecor.amebaownd.com › posts › 57343624
What are sizes of usps boxes flat rate? |
August 28, 2025 - What Are the Sizes of USPS Boxes - Flat Rate Options Explained?When it comes to shipping packages, c
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Pitney Bowes
pitneybowes.com › blog › shipping › office › usps flat rate shipping guide for ecommerce | pitney bowes
USPS Flat Rate Shipping Guide for Ecommerce | Pitney Bowes
July 25, 2025 - USPS flat rate shipping® is a service that allows businesses to ship packages at a fixed rate, regardless of the package's weight (up to 70 lbs) or destination—so long as it fits within an approved USPS flat rate box or envelope. This simplicity is what makes it a go-to for many ecommerce businesses. Instead of dealing with fluctuating shipping prices, zone charts, or weight-based rates, businesses can simply pick the right-sized box or envelope and pay one flat fee.
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EasyPost
easypost.com › home › usps flat rate boxes, envelopes, & pricing
USPS Flat Rate Boxes, Envelopes, & Pricing - EasyPost
August 10, 2025 - Outside: 11 ¼” x 8 ¾” x 6″ Inside: 11″ x 8 ½” x 5 ½” · Outside: 14″ x 12″ x 3 ½” Inside: 13″ x 5⁄8” x 11 7⁄8” x 3 3⁄8“ · As you can see while these 2 boxes are both considered to be “medium sized” they are vastly different in their dimensions and are ...
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USPS
usps.com › ship › priority-mail.htm
Priority Mail | USPS
USPS Label Delivery service: Even if you don't have a printer, you can still ship online using Click-N-Ship—for an extra $1.55 per label, we'll print an outbound label and deliver it to you. (Businesses can also request return labels for their customers.) View Price Files Calculate a Price See Insurance & Extra Services · Pay the same price for mailpieces weighing up to 70 lbs going anywhere in the U.S. Use our Priority Mail Flat Rate Envelopes or Boxes that come in standard sizes so you don't have to worry about measuring them.
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USPS Store
store.usps.com › postal store › shipping supplies › priority mail flat rate® medium box
Priority Mail Flat Rate® Medium Box | USPS.com
The Priority Mail Flat Rate® Medium Box features predetermined rates regardless of weight (domestically) or destination, similar to the Flat Rate Envelope. Please Note: This item ships in singles, and packs of 10 or 25 boxes.
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Easyship
easyship.com › blog › comparing-usps-medium-large-flat-rate-boxes
Cons of USPS Medium & Large Flat Rate Boxes | Easyship
July 29, 2025 - A medium or large flat rate box’s starting price is at $9.35 at a Post Office, a substantial jump over a cubic pricing or your custom box for packaging. This article will help you figure out when you should avoid flat rate shipping, and how ...
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USPS
about.usps.com › postal-bulletin › 2009 › pb22265 › html › info1_004.htm
Flat-Rate Package Options
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.
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USPS
usps.com › business › prices.htm
Postage Rates & Prices | USPS
USPS postage rates offer low-cost mailing and shipping prices for domestic & international customers. See Forever postage stamp prices and other postage rates.
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USPS
usps.com › ship › mail-shipping-services.htm
Mail & Shipping Services | USPS
Tracking and insurance are included, ... Priority Mail postage and shipping labels at a Post Office or online. Prices start at $10.45 at a Post Office....
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USPS Store
store.usps.com › store › results › free-shipping-supplies › shipping-supplies › _ › N-alnx4jZ7d0v8v
Shipping Supplies | Free Shipping Supplies | USPS.com
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 · Priority Mail Flat Rate® Side-Loading Medium Box ·
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USPS
pe.usps.com › text › dmm300 › notice123.htm
Notice 123 | Postal Explorer
Subtract $0.005 for each automation flat that complies with the Full-Service Intelligent Mail option requirements. ... For parcels that measure in combined length and girth more than 108 inches but not more than 130 inches, use oversized prices, regardless of weight, based on the applicable zone.
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Uspsoperationsanta
uspsoperationsanta.com › ship
Ship & Deliver Gifts with the USPS Operation Santa® Program | USPS
Enjoy a single flat shipping rate on all orders. You can order through the catalog, ship a package on your own, or do both — it’s up to you. Last day to shop is December 13.Browse Santa’s Gift Shoppe · Buy a gift from the shop of your choice, package it with a personal touch, then ship it from a participating Post Office™ location. You are responsible for packaging and postage. Remember that size, weight and distance can all affect shipping costs.