How to Mail an Envelope

How to Mail an Envelope: A Step-by-Step Guide

How to mail an envelope should be one of your basic shipping knowledge, however, if you have no idea, we got you covered. As you read on, it is our aim not just to show how to mail envelopes, but to show you how to mail envelopes of different sizes.

How to Mail an Envelope

There are several steps involved when you want to mail an envelope. These steps include:

1. Select the Appropriate Envelope

Choosing the right envelope is essential. Consider the envelope’s durability, especially if you’re sending heavy content.

Thin-walled envelopes may tear during transport, so opt for a sturdier one if needed. Ensure the envelope can accommodate both the weight of the paper and any other materials you’re mailing.

Match the envelope’s size to the contents inside; for letters, 8.5 by 11-inch paper folded into business-size envelopes is common.

If mailing overseas, use a robust envelope as international transit may pose a higher risk of damage.


2. Write an Address on the Envelope

On the front of the envelope, at its center, write the recipient’s address, including their name, zip code, and postal code.

You may include the recipient’s title and company name for professional letters. If sending mail abroad, write the name of the country in uppercase letters at the end of the address.

For mail delivered to a post office box instead of a street address, add the city, state, and country after the correct post office box number.

3. Get a Stamp

Place a first-class stamp in the top-right corner of standard-sized letters weighing less than an ounce and addressed to a U.S. destination.

You can purchase stamps at post offices and various retail locations. Stamps come in both standard and decorative designs; if you prefer decorative stamps, inquire at the post office.

Be aware that stamp prices may change over time, so ensure that old postage stamps cover the full cost of current first-class postage.

4. Calculate the Postage

Letters that are oversized, heavy, or sent internationally may require additional postage to reach their destination.

You can determine the necessary postage by weighing and measuring your letter and then checking USPS postage rates on their official website.

If you have a postage scale at home, measure and calculate postage online. Alternatively, visit a post office to have your mail weighed by a clerk, who can determine the required postage.

5. Send Your Letter

In most American cities and suburbs, you’ll find blue USPS mailboxes. Insert your letter into the slot, ensuring the box is securely closed.

A postal worker will collect your letter at the scheduled pickup time, initiating the sorting and delivery process.

If you have a mailbox at your residence, you can also use it; simply raise the red flag to signal the

How Do You Send Envelopes of Different Sizes?

There exists a variety of envelope types, each available in distinct sizes. These encompass:

1. Large Envelope

Individuals who wish to send items beyond folded letters through the postal service without requiring a full-fledged box often appreciate the convenience of oversized envelopes.

These oversized envelopes are commonly referred to as “flats” and can be obtained from delivery providers such as UPS, FedEx, and DHL, in addition to USPS.

Large envelopes serve as an excellent choice for accommodating substantial documents, marketing collateral, printed materials, and other small items that need protection from damage during transit.

Typically, their dimensions fall in the vicinity of 6 inches in height, 11 inches in width, and 14 inches in length.

2. Remittance Envelope

Remittance envelopes serve as a means to transmit or gather funds contributed to charitable causes.

These envelopes feature an extra flap, which the sender can utilize to note essential details. When sealing the envelope, this flap is folded up and secured.

The flap on the remittance envelope can also be employed to safeguard your personal information once you’ve completed the required fields.

If your remittance envelope doesn’t come with prepaid postage, you should affix a standard letter-size stamp in the upper corner.

3. Clasp Envelope

Clasp envelopes have a distinctive feature: they are processed by hand when sent through the postal system.

Consequently, even if a clasp envelope weighs less than 1 ounce, you’ll be subject to a non-machinable surcharge.

However, if you find yourself needing to use a clasp envelope and wish to sidestep this additional cost, here’s a workaround.

To avoid paying the surcharge, simply place the clasp envelope inside a regular or non-clasp envelope.

It’s important to note that you should still adhere to the standard addressing format when doing this.

2. Conformer Envelope

These envelopes offer enhanced durability compared to standard ones as they are designed for mailing heavy, bulky, and critical documents.

Their capacity to accommodate numerous items without difficulty allows you to avoid incurring additional shipping fees that would typically apply when using boxes.

When using a conformer envelope, there are some key considerations to bear in mind. Firstly, ensure that the envelope is securely sealed, especially when sending a substantial item.

Given the glossy finish of these envelopes, it’s advisable to use a Sharpie for addressing, as it provides a clear and permanent mark. Consequently, it’s best to obtain postage costs directly from the post office.



Knowing how to mail an envelope is a fundamental skill that comes in handy for various mailing needs. Whether you’re sending a standard letter or dealing with envelopes of different sizes, there are essential steps to follow.

Selecting the right envelope, addressing it correctly, affixing the appropriate postage, and ensuring secure sealing are key aspects of successful mailing.

These steps apply whether you’re dealing with standard envelopes or specialized ones like large, remittance, clasp, or conformer envelopes.

By following these guidelines, you can confidently send your mail, ensuring it reaches its destination securely and efficiently.

So, whether it’s a personal letter, important documents, or a charitable contribution, you’re now well-equipped to handle your mailing needs effectively.

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