Additional ounce penguin stamp

The additional ounce penguin stamp refers to a specific postage stamp used by the United States Postal Service (USPS) for mailing items that exceed the standard one-ounce rate. It typically features a design showcasing penguins, appealing to collectors and wildlife enthusiasts. This stamp allows senders to pay for each additional ounce of weight beyond the first ounce, making it convenient for mailing heavier letters or packages.