Here are some factors to consider:
Purpose:
* Informative: Length should be appropriate to convey information clearly and concisely.
* Persuasive: Length should be sufficient to build an argument, but not so long as to lose the reader's attention.
* Narrative: Length depends on the story being told, but should be engaging and not overly lengthy.
* Creative: Length can vary widely, depending on the style and genre.
* Academic: Length is often dictated by assignment guidelines, but should be thorough and well-supported.
Context:
* Format: Different formats have different length expectations. For example, a blog post will be shorter than a novel.
* Audience: Consider the attention span and prior knowledge of your audience.
* Platform: Length may be limited by character counts or word limits on platforms like Twitter or social media.
* Time constraints: Consider how much time your readers have available.
General Guidelines:
* Paragraphs: Aim for 3-7 sentences per paragraph.
* Essays: High school essays typically range from 500-1000 words, while college essays can be longer.
* Articles: Article lengths vary widely, but often fall between 500-1500 words.
* Books: Book lengths can vary greatly, but are often measured in chapters.
Remember: The most important thing is to make sure your writing is clear, concise, and engaging, regardless of the length.
Ultimately, the best way to determine the appropriate length for your written passage is to consider your specific goals and audience.