First-Class Mail & Postage | USPS
www.usps.com › ship › first-class-mailFirst-Class Mail ® service is an affordable and easy way to send envelopes and lightweight packages. First-Class Mail Forever ® stamps cost $0.58 (the current 1 oz price) and will never expire, even if the First-Class ™ postage rate goes up. For packages (up to 13 oz), prices start at $4.50. Buy Stamps First-Class Mail Prices.
Postage Rates & Prices | USPS
www.usps.com › business › pricesPrices. Priority Mail Express ®. From $27.25 at the Post Office ™. From $23.75 for Commercial Base ®. From $23.75 for Commercial Plus ®. Priority Mail Express Flat Rate Envelope. $27.90 at the Post Office. $24.25 for Commercial Base. $24.25 for Commercial Plus.