Stories on the Harry Potter Fanon Wiki are classified by length into several categories:
- Stories running fewer than 1,000 words are considered short-short stories or "flash fiction"
- Stories running fewer than 7,500 words are considered short stories (and include flash fiction)
- Stories running between 7,500 and 17,499 words are considered novelettes
- Stories running between 17,500 and 39,999 words are considered novellas
- Stories running longer than 40,000 words are considered novels (and include epics)
- Stories running longer than 264,000 words are considered epics