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USPS
usps.com › ship › priority-mail.htm
Priority Mail | USPS
USPS Label Delivery service: Even ... 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 ...
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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
This item ships in single, or a pack of 10 or 25 boxes. For more information, please visit the Shipping Page. Priority Mail® envelopes and boxes are free when you pay for Priority Mail shipping service.
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USPS Store
store.usps.com › store › results › shipping-supplies-boxes › _ › N-u9qwm0
Boxes | USPS.com
2 weeks ago - Filter products based on price ranges. ... Take advantage of free USPS® shipping supplies and just pay for postage when it’s time to send. ... The file or page you requested could not be found. The link you followed may be expired or broken. We apologize for any inconvenience this might cause. CONTENT Description.... The Popover plugin is similar to tooltips; it is a pop-up box that appears when the user clicks on an element.
Discussions

Is it cheaper to ship using your own box or use the priority flat rate boxes?
Depends on weight, most of the flat rate boxes are cheaper for anything over a couple pounds. More on reddit.com
🌐 r/USPS
5
0
June 11, 2025
What are you paying for a USPS small flat rate box? What shipping software?
Shipping rates go up for the holiday season, usually every October-January. But also, in case you're not aware, the small flat rate box is just about the least economical way to mail something that size. Your own box, or even a box inside the Flat Rate Padded Mailer, would be less expensive. More on reddit.com
🌐 r/Flipping
14
2
October 24, 2025
What do mailing boxes cost to ship?
If it doesn’t say flat rate, then it’s usually calculated by size and weight. Go to the post office and they’ll help you get whatever you need. More on reddit.com
🌐 r/USPS
4
0
February 12, 2021
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
15
13
January 20, 2025
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Easyship
easyship.com › blog › usps-boxes-guide
USPS Boxes 101: Sizes, Prices & Restrictions | Easyship
1 month ago - This means a USPS Flat Rate box or envelope is often the cheapest way to ship heavy items over long distances. To ship with USPS Flat Rate, you need to use USPS Flat Rate boxes. Flat Rate boxes come in three main sizes: small, medium, and large.
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GoShippo
goshippo.com › blog › usps-flat-rate-box-sizes-prices-how-it-works
USPS Flat Rate Box Sizes & Prices (2026) | Complete Guide
1 week ago - Retail prices start at $13.66 (Small) and top out at $34.02 (Large) as of April 2026; through platforms like Shippo, those drop by about 10–15 percent. ... USPS Flat Rate vs. USPS Ground Advantage · USPS Flat Rate vs.
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USPS
usps.com › ship › mail-shipping-services.htm
Mail & Shipping Services | USPS
Ship Online with USPS Ground Advantage Learn More about USPS Ground Advantage · 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.
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Airpals
airpals.co › blog › us-postal-boxes-for-shipping
USPS Flat Rate Boxes 2026: All Sizes, Dimensions & Prices
January 5, 2026 - See USPS flat rate box sizes, exact 2026 prices, inside dimensions, and when flat rate is cheaper than using your own box.
Find elsewhere
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USPS
usps.com › manage › po-boxes.htm
Rent a PO Box | USPS
Most Post Offices have 5 PO Box sizes, depending on availability*. Sizes range from extra small (XS – Size 1) to extra large (XL – Size 5). Choose your PO Box size based on the type of mail (letter-sized mail or packages) and how much mail ...
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USPS
usps.com › business › prices.htm
Postage Rates & Prices | USPS
FREE BOXES · You can check out the starting prices for many of our domestic and international mailing and shipping options below or visit the Postal Explorer® website to review the full USPS® Price List. Not sure which mailing service you need? Compare Our Services.
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EasyPost
easypost.com › home › usps flat rate boxes, envelopes, & pricing
USPS Flat Rate Boxes, Envelopes, & Pricing - EasyPost
April 5, 2026 - Using a USPS Flat Rate Box or Envelope can cut your shipping costs by 50%. This is a great way to prepare for peak shipping. In addition to large Flat Rate Boxes, small Flat Rate Boxes and medium Flat Rate Boxes, prices are supported through the EasyPost API by using our predefined packages.
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Onlineshippingcalculator
onlineshippingcalculator.com › home › guides › usps flat rate box sizes, dimensions, and prices (live reference)
USPS Flat Rate Box Sizes, Dimensions, and Prices (Live Reference)
February 24, 2024 - Complete USPS Priority Mail Flat Rate box and envelope reference — every size, internal dimensions, weight cap, and current commercial price. Refreshed monthly.
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ClickPost
clickpost.ai › home › blog › usps box sizes, prices & flat rate guide for 2026
USPS Box Sizes, Prices & Flat Rate Guide for 2026
March 20, 2026 - Explore USPS box sizes, flat rate prices, free shipping supplies, weight limits, and key mailing rules. Compare USPS boxes and choose the right option for every shipment in 2026.
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USPS Store
store.usps.com › postal store › shipping supplies › priority mail® large box
Priority Mail® Large Box | USPS.com
The Postal Service® has simplified your Priority Mail® shipping process, offering the easy-to-use Priority Mail® Top-Loading Large Box. This rectangular–shaped box accommodates a variety of items such as clothing, books, and hats. Just apply tape, address and ship. This box can be used for both domestic Priority Mail® and Priority Mail® International.
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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
Price (High-Low) Issue Date · Product Type (A-Z) Product Type (Z-A) Shipping Supplies (47) Filter by Product Type to get more specific product results. Free Shipping Supplies (47) ReadyPost Packaging (6) Priority Mail (47) Military Supplies (27) Sustainable Supplies (27) Boxes (24) International (18) Envelopes (16) Forms and Labels (15) Priority Mail Express (11) Prepaid Priority Mail (7) Scales & Accessories (4) Show More ·
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Western Oregon University
wou.edu › mail › home › domestic-mail › united-states-postal-service-usps › usps-priority-mail › usps-priority-flat-rate
USPS Priority Flat Rate – University Mail Services
Home » Home » Domestic Mail » United States Postal Service - USPS » USPS Priority Mail » USPS Priority Flat Rate Menu ... WESTERN OREGON UNIVERSITY 345 Monmouth Ave. N. Monmouth OR 97361 ... A-Z Index Accessibility Academic Calendar Class Schedule Net Price Calculator Jobs at WOU News ...
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USPS
pe.usps.com › text › dmm300 › notice123.htm
Notice 123 | Postal Explorer
For weights over 3.5 ounces, see Large Envelopes prices. See this page for size dimensions. ... For parcels that measure in combined length and girth more than 108 inches but not more than 130 inches, use the oversized price, regardless of weight, based on the applicable zone.
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Cahoot
cahoot.ai › home › usps flat rate boxes: sizes, pricing, and when they actually make sense
USPS Flat Rate Boxes: Sizes, Pricing, and When They Actually Make Sense
April 13, 2026 - Standard Priority Mail with right-sized packaging often costs less. Regional shipping makes zone-based rates competitive. Brands primarily serving customers within 600 miles (Zones 1-4) rarely benefit from Flat Rate’s zone-independence since local weight-based rates are already reasonable. Top loading flat rate boxes from USPS Priority Mail Flat Rate are designed for easy packing and extra protection, making them ideal for shipping fragile or awkwardly shaped items.