What is mailability?

• A. The weight of the mailpiece is within range.
• B. The visual appearance of the mailpiece.
• C. The mailpiece conforms to minimum and maximum size standards.
• D. The delivery speed.

Answer: (C)

Mailability is whether a mailpiece meets the Postal Service’s requirements so it can be accepted, sorted, and delivered. The defining factor here is that the piece conforms to the minimum and maximum size standards. These size limits ensure the mailpiece can move through automated equipment and fit properly in trays, containers, and handling systems. If a piece falls outside those size bounds, it may be refused or require special handling, disrupting processing. While weight within a range and a clean appearance can matter in some contexts, they don’t determine mailability as directly as meeting the size standards. Delivery speed is a service characteristic, not a mailability criterion.