Why are interoffice mail envelopes typically a different size and color?

The reason interoffice mail envelopes are typically a different size and color is to ensure they are not mistaken for regular mail. This distinction is crucial in an office setting where both internal and external communications occur. By using specific sizes and colors for interoffice mail, staff can easily identify internal correspondence at a glance, reducing the risk of misdirected or delayed messages. Effective communication flow can be maintained because everyone in the office recognizes the unique appearance of these envelopes and understands that they contain information intended solely for internal distribution.

In summary, this visual differentiation helps improve the efficiency and accuracy of mail handling within the organization, making it easier to separate internal documents from external postal items.