Use a single tab space for indenting paragraphs. Use only a single space after periods. Don't be concerned with formatting and how the piece looks. The maximum length is hard to set because topics vary so widely. However, any article in excess of 100 typed pages would be considered too long.
Articles generally run two to five pages.
Also include the names and pertinent biographical information of contributing authors. Checklist for Manuscripts Manuscripts are to be typed, double-spaced , with sufficient margins on top and bottom. Include a short and appealing suggested title and a two to four sentence descriptive blurb. Use subheads within the article to break up text. Provide biographical information on authors.