first class mail postage weight

first class mail postage weight refers to the weight limits and costs associated with USPS First-Class Mail. First-Class Mail is one of the most affordable mailing options, primarily used for letters, postcards, and lightweight parcels. The weight limit for First-Class Mail is 13 ounces for letters and 15.99 ounces for parcels. If the item exceeds these weight limits, it must be mailed through another USPS service, such as Priority Mail. The cost of First-Class Mail postage is based on weight, size, and destination, with rates starting at just a few dollars for lighter items.