Postal Service Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

The maximum weight limit for First-Class mail is 13 ounces. This limit applies to both letters and packages sent via First-Class service, which is utilized for sending items such as postcards, letters, and small parcels. Understanding this weight limit is crucial for ensuring that items are properly categorized and that postage is calculated accurately, as items over this weight limit must be sent using different classes of mail, such as Priority Mail. The First-Class service is designed for speed and reliability, and maintaining this weight threshold helps to facilitate efficient delivery within the postal system.