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First-Class Mail Flats - USPS Retail | Rate Table

What are First-Class Mail Flats, Retail rates?

First-Class Mail

First-Class Mail is one of USPS's premium services. It is often as fast as Priority Mail with delivery estimated between 1-3 days. [Learn more about USPS First-Class Mail].

This is a domestic service. Domestic mail is transported:

  • within, across, and between the United States.

  • from the United States to

    • [U.S. territories], Marshall Islands, Federal States of Micronesia.

    • [U.S. military and diplomatic posts], and the United Nations, NY.

Large Envelope / Flats

[Large Envelope Flats] is a special service within First-Class Mail. Flats are large envelopes that are smaller than 11.5" x 15", but larger than a regular envelope. Regular Envelopes are the standard of business envelopes. This product range includes the popular #10 envelope which measures 4 1/8" by 9 1/2".

Learn more about envelope dimensions.

Retail Rates

First-Class Mail rates are based on parcel weights and rate class.

Retail pricing is offered directly from the USPS at Post Office retail locations or USPS.com. It does not include discounts on postage prices like those received via ShippingEasy.

[Learn more about USPS Retail pricing].

Compare with First-Class Mail Flats | Retail

USPS provides a multitude of services and rate classes. Check out these similar services and rates to see how they compare:

2021 Rates: USPS First-Class Mail Large Envelopes / Flats | Retail

Important

Effective January 24, 2021. Learn more about 2021 rates.

USPS First-Class Mail Flats | Retail

FLATS

Weight Not Over (ounces)

Price

1

1.16

2

1.36

3

1.56

4

1.76

5

1.96

6

2.16

7

2.36

8

2.56

9

2.76

10

2.96

11

3.16

12

3.36

13

3.56

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