This type of cover letter is typically called a letter of interest, and it’s a unique option for anyone who has a very specific set of skills that they want to advertise directly to a company. If you’re planning to write a letter of interest, look at the company’s website to see whether they have any cover letter guidelines. If they don’t have guidelines, keep it short and sweet, typically around half a page. Introduce yourself, explain why you’re interested in the company, giving details on the skills and qualifications you can bring to the table. Finish the letter by asking for an opportunity to speak with someone about the position.