Final answer:
Standard-sized letterhead for a full-page business letter should have one-inch margins on the left and right. A professional font like Times New Roman or Arial size 12 should be used, and the text should be single-spaced with double spacing between paragraphs without indenting them.
Step-by-step explanation:
When preparing a full-page business letter using standard-sized letterhead, which is typically 8 1/2 x 11 inches, it is essential to adhere to certain formatting guidelines to maintain a professional appearance. The standard margins for a business letter should be one-inch wide on both the left and right sides of the page. This uniformity is a standard practice in business communication and ensures that the letter is both aesthetically pleasing and easy to read. Within these margins, you should use a legible business font such as Times New Roman or Arial, size 12, and align the text to the left. The body of the letter should be single-spaced with a double space between paragraphs. Remember not to indent the paragraphs.
Regarding indentation, any bulleted or numbered lists within the business letter should align with the left margin, with subsequent lines indented one-half inch. This maintains clarity and organization, making the letter easier to scan for important points. Adequate margin space also allows for any notes or comments that might be added by the recipient during the review process. Overall, consistent formatting and clear presentation are key to effective business communication.