Post office mail bag sizes

The United States Postal Service (USPS) offers a variety of mail bag sizes to accommodate different types and quantities of mail. Here are some common mail bag sizes used by the USPS:

  1. Standard Mail Bags:
    • Small: 12" x 15" x 3" (holds up to 50 pounds of mail)
    • Medium: 15" x 18" x 4" (holds up to 75 pounds of mail)
    • Large: 18" x 20" x 5" (holds up to 100 pounds of mail)
  2. Priority Mail Bags:
    • Small: 12" x 15" x 3" (holds up to 50 pounds of mail)
    • Medium: 15" x 18" x 4" (holds up to 75 pounds of mail)
    • Large: 18" x 20" x 5" (holds up to 100 pounds of mail)
    • Extra Large: 20" x 24" x 6" (holds up to 150 pounds of mail)
  3. Flat Rate Mail Bags:
    • Small: 12" x 15" x 3" (holds up to 70 pounds of mail)
    • Medium: 15" x 18" x 4" (holds up to 100 pounds of mail)
    • Large: 18" x 20" x 5" (holds up to 130 pounds of mail)
  4. Specialty Mail Bags:
    • Parcel Post Bags: 12" x 18" x 4" (holds up to 70 pounds of mail)
    • Regional Rate Boxes: 12" x 12" x 5" (holds up to 20 pounds of mail)

Please note that these sizes are subject to change, and the USPS may offer additional sizes or variations depending on the specific mail service and requirements. It's always a good idea to check with your local post office or the USPS website for the most up-to-date information on mail bag sizes and requirements.