First-Class Mail is a fast, low-cost way to send envelopes and postcards. See First-Class Mail and Forever stamp prices for a letter and postcard.

Nov 3, 2025 · USPS First-Class Mail® is the go-to mailing option for sending letters, postcards, forms, and large envelopes quickly and affordably. It’s perfect for everyday correspondence like bills, …

Learn USPS envelope dimensions, letter size rules, and large envelope limits. Save time and postage costs when mailing letters and business items.

Tyvek 10" x 15" First Class Mailer, White Tyvek With Center Seam & Green First-Class Marking, Top Opening, Tear & Moisture Resistant - 10" x 15" Tyvek Envelope - 5 Envelopes

Aug 7, 2025 · First-Class Mail encompasses “letters” and “flats.” Each category has distinct physical requirements that determine its classification and postage rate. A “letter” is typically a standard …

First-Class Mail is used to send envelopes containing bills, invoices, tax forms, correspondence, and more, as well as lightweight packages. You can send personal or business mail through First-Class …

USPS postage rates offer low-cost mailing and shipping prices for domestic & international customers. See Forever postage stamp prices and other postage rates.

Feb 27, 2024 · Learn about USPS First-Class Mail: An affordable option for sending letters and flat envelopes, including costs and key details.

Jan 20, 2025 · A detailed look at First Class Mail postage to determine what's best for your business and how much it costs.