Usps first class mail requirements

Here are the requirements for sending First Class Mail through the United States Postal Service (USPS):

Eligibility:

• First Class Mail is for sending letters, postcards, and lightweight packages that weigh up to 13 ounces.
• The mailpiece must be addressed to a valid address in the United States, its territories, or its military bases.

Size and Shape:

• The mailpiece must be rectangular in shape, with a maximum length of 11.5 inches, a maximum width of 6.125 inches, and a maximum thickness of 0.5 inches.
• The mailpiece must be at least 3.5 inches high and at least 5 inches long.

Weight:

• First Class Mail is limited to 13 ounces (369 grams) in weight.

Content:

• First Class Mail can contain only printed matter, such as letters, postcards, and lightweight packages.
• The mailpiece cannot contain hazardous materials, perishable items, or items that are prohibited by law.

Addressing:

• The mailpiece must be addressed to a valid address in the United States, its territories, or its military bases.
• The address must include the recipient's name, street address or post office box number, city, state, and ZIP code.
• The address must be written in ink or typed on the mailpiece.

Postage:

• The postage required for First Class Mail is based on the weight and size of the mailpiece.
• The postage rate for First Class Mail is currently $0.55 for a 1-ounce letter.

Additional Requirements:

• The mailpiece must be properly sealed and securely closed.
• The mailpiece must not be damaged or torn.
• The mailpiece must not have any excessive postage or stamps.
• The mailpiece must not be sent to a post office box or a general delivery address.

Prohibited Items:

• First Class Mail cannot be used to send items that are prohibited by law, such as:
  • Hazardous materials
  • Perishable items
  • Items that are considered obscene or indecent
  • Items that are considered to be a threat to national security

It's important to note that the USPS has specific regulations and guidelines for sending mail, and failure to comply with these requirements can result in delays, additional postage, or even refusal of delivery.