A letter of recommendation looks like a standard business letter, typically printed on the writer’s professional letterhead. It runs one to two pages, uses a formal structure with a header, salutation, three or four body paragraphs, and a closing signature. Whether it arrives as a printed document or a digital PDF, the layout follows the same pattern every time.
The Header and Opening Format
The top of the letter starts with the writer’s contact information, usually embedded in their organization’s letterhead. If letterhead isn’t available, the writer types their name, title, organization, address, phone number, and email at the top left. Below that comes the date, followed by the recipient’s name and address (if known). The whole document uses a 12-point font in a standard typeface like Arial or Times New Roman, with one-inch margins on all sides.
The salutation line addresses the recipient directly. When the writer knows who will read the letter, it opens with “Dear Dr. Smith” or “Dear Admissions Committee.” When the audience is unknown, “Dear Hiring Manager” or “To Whom It May Concern” works, though the first option sounds less generic.
What the First Paragraph Covers
The opening paragraph is short, usually three to five sentences, and answers three questions right away: who is writing, how they know the applicant, and how long they’ve known them. A professor might write, “I taught Maria in two advanced statistics courses during the 2024-2025 academic year and served as her thesis advisor.” A manager might note, “I supervised James for three years on our product engineering team.” This paragraph also includes a clear statement that the writer is recommending the person, so the reader knows the letter’s purpose immediately.
The Body Paragraphs: Skills and Evidence
The middle of the letter, typically one to three paragraphs, is where the real substance lives. This section describes the applicant’s specific achievements, personality traits, and skills, backed up by concrete examples rather than vague praise. Instead of writing “she is a hard worker,” a strong letter tells a brief story: describing a project the applicant led, a problem they solved, or a moment that demonstrated their character under pressure.
Each body paragraph usually focuses on a different quality or accomplishment. One paragraph might highlight analytical ability through a specific research project. The next might discuss leadership by describing how the applicant mentored newer team members or organized a department initiative. The best letters feel like short, vivid narratives rather than lists of adjectives. The writer draws on things they personally witnessed, which is what gives the letter its credibility.
Quantifiable results strengthen these paragraphs when they’re available. “Her analysis reduced processing time by 30 percent” carries more weight than “she improved our processes.” Similarly, academic letters often reference class rank or performance relative to peers: “Among the 120 students I’ve taught this year, Alex ranks in the top five.”
The Closing Paragraph and Signature
The final paragraph delivers a direct, unambiguous endorsement. This is where the writer states plainly that they recommend the applicant, sometimes using language that signals the strength of that recommendation. Phrases like “I recommend without reservation” or “she is among the strongest candidates I have encountered in my career” tell the reader exactly where the applicant stands. The closing also typically invites the reader to follow up with questions, and includes the writer’s phone number or email if it’s not already in the header.
Below the closing paragraph, the writer signs off with “Sincerely” or “Best regards,” leaves space for a handwritten or electronic signature, and types their full name, title, and organization underneath. The letter should always include a date, either in the header or near the signature.
Digital Submission and File Format
Most recommendation letters today are submitted electronically, and the standard file format is PDF. Many application portals require PDF specifically and won’t convert other file types for you. The document should be formatted for standard 8.5 by 11 inch pages, and file sizes generally need to stay under 1 MB, which is easy to hit with a one-to-two-page text document but can become an issue if the letterhead includes high-resolution graphics.
One technical detail worth knowing: some portals reject PDFs that have encryption, password protection, or certain types of digital signatures embedded in the file. If you’re the writer and your organization’s system automatically encrypts outgoing documents, you may need to save a clean copy before uploading. A simple PDF with a typed or image-based signature, printed on letterhead, is the safest format across nearly every submission system.
How Long It Should Be
A strong recommendation letter is almost always one full page, occasionally stretching to a page and a half for graduate school or senior professional roles. Letters shorter than three-quarters of a page can signal that the writer didn’t have much to say, which undermines the recommendation even if the words are positive. Letters longer than two pages risk losing the reader’s attention. The sweet spot is enough space to establish the relationship, tell two or three specific stories, and close with a firm endorsement.
What Sets a Strong Letter Apart
The visual format of every recommendation letter looks roughly the same. What separates a memorable one from a forgettable one is specificity. Generic letters full of phrases like “excellent student” or “great team player” read as though the writer barely knows the applicant. Letters that include a particular moment, a named project, or a comparison to peers (“the best analyst I’ve managed in 15 years”) give the reader something concrete to picture. If you’re asking someone to write a letter for you, the most helpful thing you can do is remind them of specific experiences you shared, so they have raw material to work with instead of writing from memory alone.