Heat Nuts
If your item weighs more than 10 ounces, and you have affixed postage stamps, you must take it to an employee at the retail counter of a Post Office.

must be under or = 3.5 oz  -12oz max flat
Cardboard weight per The corrugated medium is often corrugated cardboard 8.5x11= 1.5 (1.3 ozs less paper coating)
 paper .147 per sheet.
standard envelope =1/3rd of cardboard = should be 1/2 oz
 c flute cardbaord thckines .17 inches

b flute should be able to use two thcknesses


    POSTAL PRICE CALCULATOR
$1.60


4 oz large envelope
Large Envelopes (Flats)The maximum size for large envelopes is 15" x 12" x 3/4" thick. The maximum weight for large envelopes is 13 ounces.
VARIANCES OF OVER 1/4" ARE NOT ALLOWED.
13 OZ

10 OZ
12 0z
POSTAL PRICE CALCULATOR

A nonmachinable mailpiece is a mailpiece that must be sorted outside of the standard, automated mail process. Because it is more expensive to processes these mailpieces, a surcharge applies to them.

The nonmachinable surcharge is added to First-Class Mail® with any of the following criteria:


Also, the nonmachinable rate may not be charged for round-trip mailings of letters containing discs (discs mailed under specific criteria from a mailer who expects to receive the disc back from a subscriber) that are placed into the mailstream either presorted or returned single-piece.



The nonmachinable surcharge (46c) is added to First-Class Mail® with any of the following criteria:

If your letter is a standard-sized envelope and weighs 3.5 ounces or less, you will need one stamp. Large envelopes. This includes 9x12, legal, and manila envelopes, Two stamps are needed for the first ounce, and postage will be an additional $0.20 cents after.

If your bubble mailer is considered an envelope and weighs 1 ounce or less, you can slap a $0.55 forever stamp on your mailer and drop it off at your post office as usual. If your bubble mailer is considered a package, you'll choose between USPS First Class, USPS Retail Ground, Priority Mail and Media Mail.

This depends on the thickness of your bubble mailer. Once packed, if your bubble mailer is 3/4 of an inch thick or less, it’s considered an envelope. If your bubble mailer is over 3/4 of an inch thick, it’s considered a package.

This depends on several factors. If you'd like to use stamps to ship your bubble mailer up to 4 ounces through USPS First Class, it will cost around $3.74. This will take 7 forever stamps ($0.55 per stamp) to ship your bubble mailer.

https://www.youtube.com/watch?v=nbueP4bat2I&t=614s

First-Class Mail

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Retail—Single Piece

Letters (Stamped)1,4

Weight Not Over (oz.) 
1$0.68
20.92
31.16
3.51.40

Letters (Metered)1,4

Weight Not Over (oz.) 
1$0.64
20.88
31.12
3.51.36

Large Envelopes (Flats)2

Weight Not Over (oz.) 
1$1.39
21.63
31.87
42.11
52.35
62.59
72.83
83.07
93.31
103.55
113.79
124.03
134.27

Postcards3

$0.53

EDDM—Retail

Flats up to 3.3 oz.$0.203

Semipostal Stamps

Breast Cancer Research, etc.$0.850

Basic Pricing for First-Class Mail® Service

 Retail Mail PricingCommercial Mail Pricing

First-Class Mail Postcard

  • Single postcard: $0.53
  • Stamped postcard: $0.58
See Notice 123 for detailed prices

First-Class Mail Letter

  • First ounce: $0.68
  • Each additional ounce: $0.24
See Notice 123 for detailed prices
First-Class Mail Metered Mail Letter
  • First ounce: $0.64
  • Each additional ounce: $0.24

First-Class Mail Flat (Large Envelope)

  • First ounce: $1.39
  • Each additional ounce: $0.24
See Notice 123 for detailed prices

The price of a First-Class Mail item varies depending on the:

  • Type of mailing
  • Weight of the item
  • Size and shape of the mailing
  • How postage is paid
  • Whether it is subject to a nonmachinable surcharge

To determine the price of your specific First-Class Mail item, go to the Postage Price Calculator. The Business Price Calculator is available to determine prices for First-Class Mail Commercial.