Short enough to read on a phone without scrolling. For most cold emails that means 50 to 120 words and one ask.
What the numbers say
There is no trusted, independent study that settles this. Most of the figures you will find come from companies that sell email tools. They recommend anything from 50 to 120 words, and they rarely show their data.
They do agree on the direction. Mailshake's State of Cold Email 2026 says short, clear emails in a human tone get more attention. The same report puts the average reply rate at 1 to 4 percent, so every wasted line costs you.
Treat any exact word count as a starting point, and test it on your own readers. The shape matters more than the number: a few short sentences and one request.
Why short wins
The reader does not know you and owes you nothing. They give your email a few seconds, usually on a phone.
A short email can be judged in those seconds. A long one gets saved for later, and later does not come. Short also forces you to pick one ask, which is the part most cold emails get wrong.
A length for each kind of cold email
These are rules of thumb. Adjust them to your reader.
- A first sales email. 50 to 80 words.
- A follow-up. 30 to 50 words. They have the first email already.
- A cold email for a job, or to a professor. Up to 150 words. You need a line about who you are, and one about why them.
The first post on this blog sets a strict rule of under 50 words for a first email. That is the hard version. If you can do it, do it.
How to cut an email in half
- Delete the greeting line. Start with the reason you are writing.
- Delete the sentence about your company, unless it is the reason.
- Keep one specific detail about the reader. Cut the general praise.
- Keep one ask, and make it small. A reply is easier to give than a meeting.
I hope you are doing well. My name is Sam and I run a studio that helps growing companies with design. We have worked with many great brands and I would love to set up a 30 minute call to explore how we could work together.
Sara, your signup page asks for 9 fields. I redesigned one like it and signups went up. Want to see the before and after?
The first version is 46 words and says nothing about the reader. The second is 24 words and gives them a reason to answer.
When longer is fine
Length is a problem when a stranger did not ask for it. It is fine when:
- They asked you a question and the answer needs room.
- Someone they trust introduced you.
- You are replying inside a conversation that is already going.
Even then, put the ask where a quick reader will see it: in the first two lines or the last one.
Make length a rule you save
Deciding the length again for every email is how emails get long. Decide once. Write it down as a rule, such as "first emails stay under 80 words".
Nive is being built to hold rules like that and check each draft against them. You see what passed and what broke, and you send it yourself. Join the waitlist to get the demo first.