First class mail flat/large envelope

A classic!

In the United States, the United States Postal Service (USPS) offers a variety of mail services, including First Class Mail, which is a popular choice for sending letters and lightweight packages.

Here are the details on First Class Mail flat/large envelopes:

What is a flat/large envelope?

A flat/large envelope is a type of mailpiece that is rectangular in shape and has a flat, unfolded design. It is typically used for sending documents, such as letters, bills, and statements, as well as lightweight items like photographs, certificates, and brochures.

Size requirements:

To qualify as a flat/large envelope, the mailpiece must meet the following size requirements:

Weight limit:

The weight limit for First Class Mail flat/large envelopes is 13 ounces (369 grams).

Mailing rates:

The cost to mail a First Class Mail flat/large envelope depends on the weight and size of the mailpiece. Here are the current rates (subject to change):

Additional services:

You can add additional services to your First Class Mail flat/large envelope, such as:

Tips and reminders:

I hope this information helps!