Long enough to matter, short enough to read: How long should a cold email be?

How long should a cold email be? Most answers start on the sender’s side: a word count, a sentence limit, some rule picked up along the way. Try starting from the other end. The person you’re writing to will give your email a quick look and decide whether it deserves a longer one.

That leaves you two limits to work between. Long enough to matter. Short enough to read.

Long enough to matter

An email that matters has something in it. Who you are, why you’re writing to this particular person, and what you want from them.

What it doesn’t need is the padding around that. “Hope you’re doing well.” “I came across your website.” “I wanted to reach out.” Pleasantries and platitudes take up room and say nothing. The person on the other end is busy, and they never asked for your email in the first place.

Getting to the point is also what keeps the email short enough to dodge the TL;DR reflex. That’s the moment someone sees a wall of text, decides it can wait, and never gets back to it.

Short enough to read

I rarely read cold emails properly. I scan them, look for the gist, then decide on the spot: reply, leave it for later, or mark it as spam.

Two parts of the email get that first glance: the opening lines at the top and the signature at the bottom. The opener tells me why you’re writing. The signature tells me who you are. If either one wastes the glance, the middle doesn’t get much of a chance. Both count toward the email’s length, too. There’s a separate post on how to start a cold email that doesn’t read like a template, so this one sticks to the bottom end.

Your signature matters. It’s how the recipient checks there’s a real person behind the email. But you don’t have to list your Twitter, Mastodon, Instagram, Pinterest, scrapbook, personal blog, shoe size and marital status. Only what’s relevant to why you’re writing.

A fairly ordinary one, 15 words:

Best regards,

Anna Kovacs

Partnerships Manager, Northgate Media

+40 712 345 678 | northgatemedia.com

linkedin.com/in/annakovacs

The overloaded version, 62 words:

Best regards,

Anna Kovacs

Partnerships Manager | Northgate Media

Mobile: +40 712 345 678 | Office: +40 259 123 456

northgatemedia.com | annakovacs.blog

LinkedIn: linkedin.com/in/annakovacs | X: @annakovacs | Instagram: @anna.k.travels

“Turning ideas into impact, one partnership at a time.”

This email and any attachments are confidential and intended solely for the addressee. If you received it in error, please delete it.

And one that does the job in 7:

Thanks,

Anna Kovacs

Partnerships, Northgate Media

northgatemedia.com

The long one takes up more of the screen than some whole cold emails do. The 7-word one still has the part a partnership pitch needs most: a website to check.

What the data says

Belkins, a B2B lead generation agency, looked at 16.5 million cold emails it sent across 93 business domains in 2024 for its Cold Outreach Benchmarks 2025 report. Reply rates by word count:

WordsReply rateUnder 1006.1%101-2006.8%201-4005.8%401-6004.6%601+4.0%

The 101-200 range came out on top, with under 100 close behind. Past 200, reply rates start to decline. The same report found emails of 6 to 8 sentences did best.

The decline is gradual, one percentage point from the best range to the next. That sounds small. Send a few thousand cold emails a day, though, and even fractions of a percent count.

Hunter ran its own analysis of 34 million cold emails sent through Hunter Sequences between 2022 and 2024, and got a different answer. Its best range was 20 to 39 words, at 4.5%. Most other ranges, from under 20 words to over 200, landed in a narrow band between 3.5% and 4%. The analysis concluded that optimizing word count “is not a silver bullet solution to getting more replies.”

Two datasets, two answers. They agree that past a certain length, more words stop helping. Neither says length alone decides who replies.

How long should a cold email be?

Cold Email Critic had to pick a number, and it went with Belkins’ 200. Paste a cold email over 200 words into the checker and the Value section shows a warning and takes 6 points off. Follow-ups get the same warning above 80 words. There’s no study behind the 80. A follow-up simply has less to do, because the first email already introduced you. Newsletters have no length check.

The checker counts every word in the body: opener, signature, links, phone numbers, the lot. The 62-word signature above would use up almost a third of a cold email’s 200. Which is a lot of room to give an Instagram handle. If you paste a follow-up with the earlier email quoted underneath, that counts too, so paste only what you wrote.

Neither number is a hard ceiling. Voltaire, borrowing an Italian proverb, put it this way: the best is the enemy of the good. I’d take a 205-word cold email that says what it needs to over the same email after half an hour of squeezing it to 195. Same with a 90-word follow-up that already works. The warning means the email is long. It doesn’t mean it’s bad. Read it again the way your recipient will, scanning, and cut what they’d skip.

Length is only part of the first impression. The subject line comes before any of it, and that’s covered in Good email, dead subject line. For everything else that goes into a cold email, from opener to sign-off, there’s how to write a cold email that doesn’t suck.