Marketing, sales & UX laws · law 041
Miller's Law
Also known as: The magical number seven, plus or minus two
By Shivam Bhandari · Reviewed 31 October 2026 · How we write
what it means
People can hold only a few items in working memory at once — so chunk information into small groups.
How Miller's Law works
Working memory is small. Long lists, dense pricing tables, and complex instructions overload it, so people forget, misread, or give up.
Chunking — grouping items into a few meaningful blocks — makes information easier to remember and act on. It is why phone numbers are split into groups.
where it comes from
Psychologist George A. Miller's 1956 paper “The Magical Number Seven, Plus or Minus Two.” Later research, notably Nelson Cowan in 2001, suggests the real limit is closer to about four chunks.
Miller's Law examples in business
Pitches
A salesperson structures a pitch around three benefits instead of listing twelve features.
Onboarding
A new-employee checklist is split into Day 1, Week 1, and Month 1 blocks.
Navigation
A website groups 30 product types into five clear categories.
How to apply it
- 1Limit key messages to three to five points.
- 2Group long lists into labelled chunks.
- 3Break processes into stages with a few steps each.
- 4Put the most important item first or last, where memory is strongest.
common misreading
It does not mean menus should have exactly seven items — the point is to reduce memory load, not hit a number.
ask yourself
How many things are you asking customers to remember at once?
Frequently asked questions
What is Miller's Law?
People can hold only a few items in working memory at once — so chunk information into small groups. Working memory is small. Long lists, dense pricing tables, and complex instructions overload it, so people forget, misread, or give up.
Who came up with Miller's Law?
Psychologist George A. Miller's 1956 paper “The Magical Number Seven, Plus or Minus Two.” Later research, notably Nelson Cowan in 2001, suggests the real limit is closer to about four chunks.
How do you apply Miller's Law in business?
1. Limit key messages to three to five points. 2. Group long lists into labelled chunks. 3. Break processes into stages with a few steps each. 4. Put the most important item first or last, where memory is strongest.
What is a common misunderstanding of Miller's Law?
It does not mean menus should have exactly seven items — the point is to reduce memory load, not hit a number.