A good cover letter is 300 to 400 words, three to four paragraphs, on one page. That is the answer the recruiter wants. Anything under 250 words usually skips evidence; anything over 500 means you have not edited enough. The sweet spot is 350 words at 11pt with standard margins.
Word Count Reference
Here is how cover letter length maps to format and tone:
| Length | Words | When to use |
|---|---|---|
| Email / online form | 150-250 | LinkedIn message, brief application form |
| Short cover letter | 250-300 | Junior roles, fast-paced industries (tech, startups) |
| Standard (recommended) | 300-400 | Most jobs across industries |
| Long-form | 400-500 | Senior or executive roles, career change |
| Too long | 500+ | Almost always over-edited; cut by 25% |
Three or Four Paragraph Structure
A 350-word cover letter breaks down cleanly:
- Opening (50-75 words): Name the role, name the company, and lead with one sentence that signals fit. Skip "I am writing to apply for..." - that wastes 8 words on what is already obvious.
- Body 1 (100-150 words): Your single strongest piece of evidence that you can do this job. One specific achievement with a number attached. "Cut customer support response time from 36 hours to 6 hours" beats "Strong communication skills" every time.
- Body 2 (100-150 words): Why this company, why now. Show you understand what the team is working on and why you care. This is the paragraph that distinguishes a tailored letter from a template.
- Closing (50-75 words): Thank the reader, propose a concrete next step ("I would welcome a 20-minute call to walk through how I would approach the first 60 days"), and sign off.
Industry Variations
- Tech / startups (300-350 words): Shorter is better. Engineers and PMs read fast. Lead with measurable impact.
- Finance / consulting (350-400 words): Slightly more formal; spend extra words on prestige signaling and analytical evidence.
- Marketing / creative (300-400 words): Voice matters more than length. A distinctive opening sentence is worth 50 words of generic intro.
- Academia / research (400-600 words): Cover letters here are closer to short essays. Reference specific papers, faculty, or programs.
- Government / nonprofits (400-500 words): Formal tone, more biographical detail, explicit alignment with mission.
- Healthcare / clinical (350-450 words): Mix of credentials (degrees, certifications) and patient-focused language.
ATS-Friendly Formatting
Applicant Tracking Systems (ATS) parse your cover letter as plain text. To make sure yours survives:
- Skip headers and footers. Many ATS strip them. Put your name and contact info in the body.
- Use 11pt Arial, Calibri, or Times New Roman. Standard fonts parse cleanly.
- Standard 1-inch margins. Avoid creative layouts.
- No images, no tables, no text boxes. ATS often skip them or scramble the order.
- Save as PDF unless the application asks for .docx. PDFs preserve formatting but check that text is selectable, not rasterized.
A 350-word letter at 11pt with 1.15 line spacing fits on one page with room to spare. If you cannot get to one page, your draft is too long.
Common Mistakes
- Restating your resume. The cover letter complements the resume; it should not summarize it. Pick one or two accomplishments and add context the resume cannot fit.
- Generic opening. "I am excited to apply for..." is the sentence everyone writes. Replace it with one that names a specific reason you want this role at this company.
- Filler words. "Basically", "very", "really", "I believe that", "in my opinion" - cut all of them. A 350-word letter with zero filler reads stronger than a 450-word letter with 100 filler words.
- No specific ask. Closing with "Thank you for your consideration" is polite but passive. "I would welcome a 20-minute call this week or next" is action.
- Forgetting to track word count. Use the Word Counter to keep your draft inside the 300-400 word target. Most over-long letters happen because the writer never checked.
Sample Cover Letter Structure (350 Words)
Opening (60 words): Dear Hiring Manager, I am writing about the Senior Product Manager role on the Growth team. I have spent the last four years owning experimentation programs at SaaS companies in the 100-500 employee range, and your recent post about A/B testing infrastructure is exactly the work I want to do next.
Body 1 (130 words): At Acme, I rebuilt the experimentation pipeline from a manual spreadsheet workflow to a self-serve platform. Within six months, the number of tests run per quarter went from 12 to 78. More importantly, we cut the average test duration from 23 days to 9 days by introducing sequential testing methods. The shipped winners drove a measurable 14% lift in trial-to-paid conversion. The hardest part was not the engineering - it was getting the data team and the marketing team to agree on a single metric definition. I led that alignment work and documented it in a metrics handbook the whole company now uses.
Body 2 (110 words): What pulled me to your team specifically: I read your CTO talk about treating experimentation as a first-class product surface, not a support function. That framing resonates. The companies I have worked at have all eventually hit the wall where experimentation lived in two or three different tools and nobody trusted the results. Your team seems to be building the system I wished existed at every previous company. I want to help you build it.
Closing (50 words): I would welcome a 20-minute call this week or next to walk through how I would approach the first 60 days. Either way, thank you for reading this far. Looking forward to hearing from you. Best, [Your Name]
That is 350 words. It would print on one page at 11pt with 1.15 line spacing and standard margins. Every paragraph does specific work that a resume bullet cannot do.