What is the required postage for a one-ounce letter sent via First-Class Mail?

The required postage for a one-ounce letter sent via First-Class Mail is 58 cents. This rate applies to standard letters up to one ounce, and it reflects the pricing set by the United States Postal Service (USPS) as of the last update in 2023. Understanding this postage requirement is essential for ensuring that mail is sent correctly without delay or additional charges.

The other options reflect different postal rates that may apply to heavier letters or other types of mail services, but for a one-ounce letter specifically in First-Class Mail, the established rate is 58 cents. This knowledge is crucial for anyone working with mail at the USPS, as it helps maintain adherence to postal regulations and customer satisfaction.