What is the weight limit for First-Class Mail?

First-Class Mail has a weight limit of 13 ounces. This classification allows for the quick and reliable delivery of items such as letters, postcards, and lightweight parcels. The limit is set to ensure that First-Class Mail remains efficient and cost-effective, as it is intended for small and medium-sized items that are typically sent by consumers and businesses.

Items weighing up to 1 ounce can be sent as letters, and as the weight increases, the classification may shift towards packages, but First-Class Mail still maintains that upper weight limit of 13 ounces for all items sent within this service. Anything over this weight would require a different postal service option, such as Priority Mail, which can accommodate heavier packages.