How Much Does It Cost To Mail A 9×12 Envelope?

Last Updated on December 1, 2021 by

Nowadays, it has become common for people to send packages by mail rather than personally go to the post office themselves. Although mailing a package can be an easy task, there are some things that one must know before sending a package through the postal service.

One of these crucial pieces of information is how much does it cost to mail a 9×12 envelope. Mailed envelopes and packages may come in different sizes and weights.

When mailing an object that weighs less than 13 ounces and has dimensions smaller than the standard size of 12 by 9 by 0.75 inches, then one can use first-class mail service with an ordinary stamp attached to pay its shipping cost. This shipping option only takes two days at most for delivery purposes.

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If, however, the package to be sent is larger than 6.5 inches in any direction or if it weighs more than 13 ounces but less than 16 ounces, then priority mail flat-rate envelope can be used. This type of envelope costs $7.20, including free tracking service and an insurance fee for up to $50 in value. The only disadvantage in using this shipping option is that it will take between three to five days before the recipient receives the package.

For packages with a weight greater than 16 ounces or measuring more than 1 cubic foot in volume, then one can use priority mail service with an ordinary stamp attached.

Priority mail offers two options: The first choice is Parcel Select Ground which can take up to seven days, while the second choice is Parcel Select with a delivery date guaranteed between 1 to 3 days. According to the US Postal Service, the cost of mailing this type of package is determined by its size and weight, plus the distance traveled from origin to destination.

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Another way to figure out the exact cost of mailing an envelope or a package is by directly visiting US Post Office’s website or calling their toll-free number for more details on shipping fees.

A few years ago, it was necessary for people who wanted to send packages through the postal service to provide their own packaging materials, but now that has changed. Now, there are several shipping companies that have their own packaging products available for purchase online or in stores if one prefers not buying them instead of making his or her own.

Although the postal service requires postage fees in order to provide their services, one can save money by using USPS’ discount program called “The Intelligent Mail option barcode”. By using this particular postage stamp, people who use the postal service to send important documents would be entitled to discounts on their mailing expenses. For more information on how much does it cost to mail a 9×12 envelope, visit US Postal Service’s website or call their toll-free number today!

Large Envelopes/Small Packages

large envelopes/small packages

•Size: Larger than 6.5 inches in any direction or a dimension larger than 1 cubic foot in volume, but less than 16 ounces and not more than 13″x9″x6″.

•Size: Smaller than six square inches.

•Price for shipping depends on the size of the envelope/packages being sent and its weight. Shipping cost increases when materials such as plastic bags, boxes, metal cases are used to package the item being sent. In this case, since postage fees depend on exact measurements of an item being mailed, it is best to directly visit US Post Office’s website or call their toll-free number for more details on shipping fees.

First-Class Package Service

•Weight: Less than 13 ounces.

•Dims: smaller than 12x9x0.75 inches.

•Price: $0.46

Priority Mail Flat-Rate Envelope

•Weight: up to 13 ounces.

•Dims any size as long as it is less than 6.5 inches on any side and 1 cubic foot in volume or less.

•Price: $7.20

Parcel Select Ground

This service is for packages that weigh more than 16 ounces, but less than 20 pounds and measure no more than 1 cubic foot in volume. This option can take up to 7 business days for delivery, depending on the distance traveled from origin to destination.

Parcel Select Ground guarantees delivery within 1 to 3 business days.

Shipping Cost: $10.70

Priority Mail Medium Flat-Rate Envelope

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•Weight: up to 20 pounds.

•Dimensions: 12x8x4 inches, but not more than 15″ x 5″ x 10″.

•Price: $15.35 for shipping if it is shipped with USPS tracking service that costs an additional $0.44 per article being sent out. The total sum would then be $15.79 per article being mailed out to an address in the United States only.

Postage Rate Increase

The cost of mailing a 9×12 envelope is increasing on January 21, 2019. The new postage rate will be $1.15, an increase of 15 cents from the current rate.

If you need to mail a large envelope, make sure to do so before the rate increase takes effect. You can also save on postage by using a Forever stamp.

How Much Does it Cost to Mail a Bubble Mailer?

Bubble Mailers are unique envelopes because they have a bubble lining that allows the contents inside to be secure and safe from damage. These envelopes also have an adhesive strip, which is manually applied before sealing the package.


Bubble mailers come in all different sizes and weights, but typically cost anywhere from $0.05 to $0.50 each to ship depending on the size and shipping method chosen.

The most popular way to send these packages is via the First-Class Package service through the United States Postal Service (USPS). USPS offers free packaging supplies at their offices for those who do not want to pay for extra items such as tape or packing peanuts.

To find out how much it costs to mail 9″ x 12″ Bubble Mailers (standard bubble envelope), follow these steps.

1) Go to the USPS website and click on the “Calculate Rates” button under Postage Price Calculator.

2) Once you are on the Shipping Price page, scroll to 1.) Package/ Parcel Select, 2.) Regional Rate Boxes A & B (if applicable), 3.) Oversize if it applies, 4.) 9-Digit Zip Code, 5.) 1st Class Package Service, 6.) 1lb., 7.) Bubble Envelope.

3) Look at the 1st Class Mail Parcel table for prices. For example purposes, we will say that you are shipping a package that weighs 9 oz with dimensions of 12 x 9 x 0.125 inches. This will be the cheapest option to ship a 9×12 envelope.

4) Lastly, take the price located in step and multiply it by your desired quantity of Bubble Mailers to arrive at the total cost for shipping one package or multiple packages at once. For example purposes, we’ll say you are looking to send out 20 Bubble Mailers via USPS First-Class Package Service. The average weight for this size Bubble Mailer is around 5 oz so that would come out to $10 x 2 (multiply by two because there are two thicknesses involved with packaging) = $20 total cost for 20 9″ x 12″ mailing envelopes via USPS First Class service.

5) See the article on how much does it cost to mail a 9×12 envelope.

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