2024 Postage Rates Per Ounce. Changes by usps for postcards, flats & letter size. This article provides information on the types of rates usps provides, the discounts you'll receive when shipping usps through stamps.com, and a sampling of the usps.

India post gazette notification on standardization of mails [192 kb] weight (in gms) length (in cm). If favorably reviewed by the prc, the proposed increases will raise the cost of mailing.