What is the desired line length for business letters, emails, and memos for short paragraphs?

The desired line length for short paragraphs in business letters, emails, and memos is typically four to five lines. This length strikes a balance between readability and conciseness, ensuring that the message is clear without overwhelming the reader with too much text at once. Keeping paragraphs to a manageable length allows readers to absorb information quickly and enables easier scanning of the written content.

Longer paragraphs can lead to disengagement, particularly in business communication, where clarity and brevity are essential. This standard reflects best practices in professional writing, promoting efficiency in communication. Therefore, the best choice would be in the four to five lines range.