Miller's law

Why it matters

The lesson isn't "limit everything to seven". It's that information must be chunked into small, meaningful groups people can scan.

• Chunk long strings: card numbers in fours, phone numbers by area code, codes in groups.
• Group long lists and settings under headings of roughly 3 to 7 items each.
• Split long forms into labelled sections or steps.
• Don't use the number seven to justify cutting things people need.