How many pounds is flat rate shipping?
70 lbs

Priority Mail Flat Rate® products let you ship packages up to 70 lbs to any state at the same price. Ship from Post Office™ locations or online from your home or business. Prices start at $9.25 at a Post Office.What are the 2023 USPS flat rate box and envelope sizes and prices

USPS Flat Rate Envelopes
Dimensions Priority Mail
Flat rate envelope 12-1/2" x 9-1/2" $9.65
Legal flat rate envelope 15" x 9-1/2" $9.95
Padded flat rate envelope 12-1/2" x 9-1/2" $10.40

For shipments traveling shorter distances, Zones 1-4, and weighing less than 20 lbs, using your own packaging for weight-based rates may be a better value. Across all zones, though, shipments weighing over 25 lbs will ship for less in a Flat Rate Large Box.

Which is cheaper flat rate or priorityIf you are primarily shipping products locally across short distances, opting for Priority Mail services rather than Fixed Rate might make sense. If your shipments generally cover a long distance or you are shipping all across the US, Flat Rate envelopes and boxes will often work out to be cheaper.

Can I use a flat rate box but pay by weight

Customers may mail any amount of mailable material in a USPS-produced Priority Mail flat-rate box. The postage for a flat-rate box is $7.70, regardless of weight or destination. Only USPS-produced Priority Mail flat-rate boxes are eligible for the flat-rate box rate.USPS Priority Mail is generally the cheapest shipping service for 2-3 day shipping. FedEx, UPS, and other courier companies offer delivery services with similar lead time expectations, but USPS offers the lowest rates.

What is an example of flat rate shipping

How Much Does USPS Flat Shipping Cost

Packaging Dimensions Cost (Domestic, Retail Price)
Padded Flat Rate Envelope 12 1/2" x 9 1/2" $10.40
Small Flat Rate Box 8 11/16" x 5 7/16" x 1 3/4" $10.20
Medium Flat Rate Box – 1 (Top-Loading) 11 1/4" x 8 3/4" x 6" $17.10
Medium Flat Rate Box – 2 (Side-Loading) 14" x 12" x 3 1/4" $17.10


Most USPS boxes are free, including Regional Rate boxes and Flat Rate boxes. This is also true of all packaging for all USPS Priority Mail and Priority Mail Express services. To clarify, Flat Rate and Regional Rate fall under the umbrella of Priority Mail services, so that's why they come with free USPS boxes.

What is the most affordable flat rate shipping

The cheapest shipping for small packages

Courier Service Cost Package Dimensions
USPS Priority Mail® (Small Flat Rate Box) $10.20 8-5/8” x 5-3/8” x 1-5/8”
UPS Ground $14.09 8” x 5” x 1”
FedEx Ground® $13.54 8” x 5” x 1”

2023/08/23Depending on the nature of the item you're shipping, the shipping distance, and the shipping service provider, either a flat rate box or your own box can be cheaper. To find out which option is cheaper among different carriers, we will compare flat-rate shipping and standard shipping options that UPS and FedEx offer.Priority Mail Express Flat Rate Products

Free Supplies7 Shipping Price
Flat Rate Envelope $26.35 Commercial Pricing $30.45 at Post Office
Legal Flat Rate Envelope $26.65 Commercial Pricing $30.65 at Post Office
Padded Flat Rate Envelope $26.85 Commercial Pricing $31.20 at Post Office


When used with the right USPS service, custom packaging is often cheaper than USPS Medium flat rate boxes. With medium and large flat rate boxes offered by the USPS for free, it's a great, cost-cutting option.

What is the cheapest way to ship 50 poundsIf you're looking for the cheapest way to ship large or heavy packages, USPS Ground AdvantageTM is the cheapest way to ship 50lbs. However, USPS has a 70lb weight limit for parcels. To avoid USPS surcharges, you can ship heavier packages with FedEx or UPS.

Is flat rate shipping internationalThe flat rate international delivery service offered by USPS is available to approximately 180 countries and takes between 6-10 business days. It also includes USPS tracking and insurance (up to $100 for documents and up to $200 for merchandise.)

How does flat rate pricing work

Flat-rate pricing is a simple pricing strategy in which a business or individual charges a fixed fee for a particular service, regardless of how much time it takes to complete. Flat-rate pricing is sometimes called 'fixed fee' or 'flat fee' pricing.

Depending on the nature of the item you're shipping, the shipping distance, and the shipping service provider, either a flat rate box or your own box can be cheaper. To find out which option is cheaper among different carriers, we will compare flat-rate shipping and standard shipping options that UPS and FedEx offer.Most Priority Mail International shipments include tracking and insurance: up to $100 for nonnegotiable documents and up to $200 for merchandise. You can send up to 4 lbs using Priority Mail International Flat Rate Envelopes and Small Flat Rate Boxes, and up to 20 lbs. using Medium and Large Flat Rate Boxes.

Generic Prices
Weight Price from Delivery time
50 lbs $72,16 2-4 business days
51 lbs $91,10 2-4 business days
52 lbs $92,16 2-4 business days