Postage Rates 2024 Flat Envelope. Dive in as we break down the 2024 updates. This means that a flat that weighs 2 ounces, for example, will now require $1.77 in postage.

The changes will raise mailing services product prices approximately 7.8 percent. Changes by usps for postcards, flats & letter size explore the usps postage rate shifts for postcards, flats, and letter sizes in 2024, and optimize your mailing strategies accordingly to save costs.