What is a legal flat rate envelope

No one greets rate increases with open arms. The good news is our Discounted Rates vs Retail Rates will continue to save you money with just about everything you mail and ship.

UPS

UPS is maintaining their already competitive rates and continue to waive Peak Surcharges for customers that print UPS with Stamps.com.

  • Up to 69% off UPS 2nd Day Air® and up to 55% off UPS® Ground.*
  • Up to 86% off on International Services
  • No Residential Surcharges
  • No Peak Period Surcharges
  • No Fuel Surcharges

*Discounts off UPS® Daily Rates. Rates are limited to shipping from the U.S. only. Rates and any applicable discounts are subject to change at any time without notice.

USPS

Effective January 9, 2022, these are the USPS Mail/Ship Rates.

Our software will automatically calculate the latest rates.

Letters

Stamps.com

Retail

First-Class Mail letter (1 oz.)

$0.53

$0.58

First-Class Mail letter - each additional ounce

$0.20

$0.20

First-Class Mail Flat/Large Envelope (1 oz.)

$1.16

$1.16

First-Class Mail Flat/Large Envelope -each additional ounce

$0.20

$0.20

Postcard

$0.40

$0.40

Flat Rate Envelopes

Stamps.com

Retail

Priority Mail Flat Rate Envelope

$7.75

$8.95

Priority Mail Legal Flat Rate Envelope

$8.05

$9.25

Priority Mail Padded Flat Rate Envelope

$8.45

$9.65

Priority Mail Express Flat Rate Envelope

$23.50

$26.95

Priority Mail Express Legal Flat Rate Envelope

$23.75

$27.10

Priority Mail Express Padded Flat Rate Envelope

$23.95

$27.50

Packages*

Stamps.com

Retail

Media Mail (1 lb.)

from $3.19

from $3.19

Parcel Select Ground®(1 lb.)

from $7.22

from $8.50

First Class® Package Service (1 oz.)

from $3.37

from $4.50

Priority Mail (1 lb.)

from $7.37

from $8.70

Priority Mail Small Flat Rate Box

$8.25

$9.45

Priority Mail Medium Flat Rate Box

$14.25

$16.10

Priority Mail Large Flat Rate Box

$19.20

$21.50

Priority Mail APO/FPO/DPO Large Flat Rate Box

$17.70

$20.00

Priority Mail Regional Rate Box A

from $8.38

NA

Priority Mail Regional Rate Box B

from $8,88

NA

Priority Mail Express (0.5 lb.)

from $23.50

from $26.95

International Mail & Packages

Stamps.com

Retail

First Class Mail Intl Letters (1 oz.)

$1.30

$1.30

First Class Mail Intl Flats- 1 oz.)

from $2.60

from $2.60

First Class Mail Intl Flats- Merchandise (up to 15.994 oz.) Learn More

TBD

NA

CANADA    
Prepay Canadian Duties and Taxes  Learn More

TBD

NA

First Class Package Intl Service - Canada (1 lb.)

from $21.00

from $22.10

Priority Mail Intl (1 lb.)- Canada

from $37.47

from $40.45

Priority Mail Intl Flat Rate Envelopes - Canada

$28.13

$29.60

Priority Mail Intl Small Flat Rate Box - Canada

$29.17

$30.70

Priority Mail Intl Medium Flat Rate Box - Canada

$53.94

$56.80

Priority Mail Intl Large Flat Rate Box - Canada

$70.13

$73.80

Priority Mail Express Intl Flat Rate Envelopes - Canada

$44.95

$47.95

MEXICO    
First Class Package Intl Service - Mexico (1 lb.)

from $21.47

from $22.60

OTHER COUNTRIES    
First Class Package Intl Service - Other Countries (1 lb.)

from $21.47

from $22.60

Priority Mail Intl (1 lb.)- Other Countries

from $46.36

from $48.80

Priority Mail Intl Flat Rate Envelopes - Other Countries

from $35.01

from $36.85

Priority Mail Intl Small Flat Rate Box - Other Countries

from $36.62

from $38.55

Priority Mail Intl Medium Flat Rate Box - Other Countries

from $78.71

from $82.85

Priority Mail Intl Large Flat Rate Box - Other Countries

from $102.70

from $108.10

Priority Mail Express Intl (0.5 lb.)

from $44.95

from $47.95

Global Express Guaranteed (0.5 lb.)

from $64.41

from $67.80

Special Services

Stamps.com

Retail

Certified Mail™

$3.75

$3.75

Certified Mail™ Restricted Delivery

$9.75

$9.75

Certificate of Mailing

$1.65

$1.65

Registered Mail™

from $13.75

from $13.75

Restricted Delivery

$9.75

$9.75

Return Receipt -(mail)

$3.05

$3.05

Return Receipt -(electronic)

$1.85

$1.85

Signature Confirmation™(First Class Package Service-electronic)

$2.90

$3.45

Adult Signature - (Basic)

$8.50

$8.50

Adult Signature - (Person Specific)

$8.75

$8.75

Package Intercept

$15.95

$15.95

USPS Return Service (Pay-On-Use Return)  Learn More

from $6.45

 

* Starting April 3, 2022, the USPS is adding new surcharges for large packages*:

  • If the longest side of a package is more than 22 inches but less than 30 inches, a $4.00 surcharge will be applied
  • If the longest side of a package is greater than 30 inches, a $15.00 surcharge will be applied
  • If the volume of the package is greater than 2 cubic feet, a $15.00 surcharge will be applied*
  • Packages with missing or incorrect package dimensions that result in any dimensions-based fees, a $1.50 surcharge will be applied

* Does not apply to First Class and Media Mail.

We suggest you review your shipping process to keep your larger packages in the smallest box possible to avoid these surcharges. And when shipping packages, select Large Package.

* Calculating the cubic dimensions of your packages isn't difficult. A square package 1 foot by 1 foot is 1 cubic foot. A square package 2 feet by 2 feet is 2 Cublic feet. A 2 cubic foot square box is pretty big and well beyond the size of most packages being shipped. For boxes that aren't square, measure the Length, Width, and Height of your box in inches. Multiply the Length, Width, and Height, and then divide that total by 1,728. That is the exact cubic dimension of your package.

UPS

UPS is maintaining their already competitive rates and continue to waive Peak Surcharges for customers that print UPS with Endicia.

  • Up to 69% off UPS 2nd Day Air® and up to 55% off UPS® Ground.*
  • Up to 86% off on International Services
  • No Residential Surcharges
  • No Peak Period Surcharges
  • No Fuel Surcharges

*Discounts off UPS® Daily Rates. Rates are limited to shipping from the U.S. only. Rates and any applicable discounts are subject to change at any time without notice.

USPS

Effective January 9, 2022 these are the USPS Mail/Ship Rates.

Our software will automatically calculate new rates.

Letters

Endicia

Retail

First-Class Mail letter (1 oz.)

$0.53

$0.58

First-Class Mail letter - each additional ounce

$0.20

$0.20

First-Class Mail Flat/Large Envelope (1 oz.)

$1.16

$1.16

First-Class Mail Flat/Large Envelope -each additional ounce

$0.20

$0.20

Postcard

$0.40

$0.40

Flat Rate Envelopes

Endicia

Retail

Priority Mail Flat Rate Envelope

$7.75

$8.95

Priority Mail Legal Flat Rate Envelope

$8.05

$9.25

Priority Mail Padded Flat Rate Envelope

$8.45

$9.65

Priority Mail Express Flat Rate Envelope

$23.50

$26.95

Priority Mail Express Legal Flat Rate Envelope

$23.75

$27.10

Priority Mail Express Padded Flat Rate Envelope

$23.95

$27.50

Packages*

Endicia

Retail

Media Mail (1 lb.)

from $3.19

from $3.19

Parcel Select Ground®(1 lb.)

from $7.22

from $8.50

First Class® Package Service (1 oz.)

from $3.37

from $4.50

Priority Mail (1 lb.)

from $7.37

from $8.70

Priority Mail Small Flat Rate Box

$8.25

$9.45

Priority Mail Medium Flat Rate Box

$14.25

$16.10

Priority Mail Large Flat Rate Box

$19.20

$21.50

Priority Mail APO/FPO/DPO Large Flat Rate Box

$17.70

$20.00

Priority Mail Regional Rate Box A

from $8.38

NA

Priority Mail Regional Rate Box B

from $8,88

NA

Priority Mail Express (0.5 lb.)

from $23.50

from $26.95

International Mail & Packages

Endicia

Retail

First Class Mail Intl Letters (1 oz.)

$1.30

$1.30

First Class Mail Intl Flats- 1 oz.)

from $2.60

from $2.60

First Class Mail Intl Flats- Merchandise (up to 15.994 oz.) Learn More

TBD

NA

CANADA    
Prepay Canadian Duties and Taxes  Learn More

TBD

NA

First Class Package Intl Service - Canada (1 lb.)

from $21.00

from $22.10

Priority Mail Intl (1 lb.)- Canada

from $37.47

from $40.45

Priority Mail Intl Flat Rate Envelopes - Canada

$28.13

$29.60

Priority Mail Intl Small Flat Rate Box - Canada

$29.17

$30.70

Priority Mail Intl Medium Flat Rate Box - Canada

$53.94

$56.80

Priority Mail Intl Large Flat Rate Box - Canada

$70.13

$73.80

Priority Mail Express Intl Flat Rate Envelopes - Canada

$44.95

$47.95

MEXICO    
First Class Package Intl Service - Mexico (1 lb.)

from $21.47

from $22.60

OTHER COUNTRIES    
First Class Package Intl Service - Other Countries (1 lb.)

from $21.47

from $22.60

Priority Mail Intl (1 lb.)- Other Countries

from $46.36

from $48.80

Priority Mail Intl Flat Rate Envelopes - Other Countries

from $35.01

from $36.85

Priority Mail Intl Small Flat Rate Box - Other Countries

from $36.62

from $38.55

Priority Mail Intl Medium Flat Rate Box - Other Countries

from $78.71

from $82.85

Priority Mail Intl Large Flat Rate Box - Other Countries

from $102.70

from $108.10

Priority Mail Express Intl (0.5 lb.)

from $44.95

from $47.95

Global Express Guaranteed (0.5 lb.)

from $64.41

from $67.80

Special Services

Endicia

Retail

Certified Mail™

$3.75

$3.75

Certified Mail™ Restricted Delivery

$9.75

$9.75

Certificate of Mailing

$1.65

$1.65

Registered Mail™

from $13.75

from $13.75

Restricted Delivery

$9.75

$9.75

Return Receipt -(mail)

$3.05

$3.05

Return Receipt -(electronic)

$1.85

$1.85

Signature Confirmation™(First Class Package Service-electronic)

$2.90

$3.45

Adult Signature - (Basic)

$8.50

$8.50

Adult Signature - (Person Specific)

$8.75

$8.75

Package Intercept

$15.95

$15.95

USPS Return Service (Pay-On-Use Return)  Learn More

from $6.45

 

* Starting April 3, 2022, the USPS is adding new surcharges for large packages:

  • If the longest side of a package is more than 22 inches but less than 30 inches, a $4.00 surcharge will be applied
  • If the longest side of a package is greater than 30 inches, a $15.00 surcharge will be applied
  • If the volume of the package is greater than 2 cubic feet, a $15.00 surcharge will be applied*
  • Packages with missing or incorrect package dimensions that result in any dimensions-based fees, a $1.50 surcharge will be applied

* Does not apply to First Class and Media Mail.

We suggest you review your shipping process to keep your larger packages in the smallest box possible to avoid these surcharges. And when shipping packages, select First Class Large Package.

* Calculating the cubic dimensions of your packages isn't difficult. A square package 1 foot by 1 foot is 1 cubic foot. A square package 2 feet by 2 feet is 2 Cublic feet. A 2 cubic foot square box is pretty big and well beyond the size of most packages being shipped. For boxes that aren't square, measure the Length, Width, and Height of your box in inches. Multiply the Length, Width, and Height, and then divide that total by 1,728. That is the exact cubic dimension of your package.

What can you ship in a legal flat rate envelope?

Flat Rate Envelopes are best suited for documents, but if you choose to send another type of item (up to 70 pounds), it should not reconstruct or expand the envelope in any way. As long as the envelope closes within the normal folds, bulges will not matter. There is no maximum thickness for Flat Rate Envelopes.

What is considered a flat rate envelope?

A Large Envelope is a rectangular mailpiece no thicker than 3/4 inch. They are commonly referred to as “Flats.” Flats must be: Flexible. Have four square corners (or finished corners not exceeding a radius of 0.125 (1/8) inch.

How thick can a legal flat rate envelope be?

Whatever you call them, flats must: Have one dimension that is greater than 6-1/8 inches high OR 11-½ inches long OR ¼ inch thick. Be no more than 12 inches high x 15 inches long x ¾ inch thick.

What is a USPS legal envelope?

This paperboard envelope is designed to accommodate legal sized documents. It is ideal for sending letters and other large documents via Priority Mail. Size: 15" x 9 1/2" USPS SKU: EP14L.

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