# Dunbar's Number & Team Size

*Tom Geraghty · Organisational Design, Complexity & Systems*

Applies Dunbar's Number — the ~150 person cognitive limit on stable relationships — to team design and organisational structure. Shows the evolutionary basis for the limit and its practical implications for when organisations should split, restructure, or form distinct units.

- **This page:** https://explore.psychsafety.com/n/psychological-safety-82-dunbars-number-and-team-size/
- **Read the full article on psychsafety.com:** https://psychsafety.com/psychological-safety-82-dunbars-number-and-team-size/
- **Interactive map:** https://explore.psychsafety.com/?node=dunbar

## Connected concepts (4)

- [Organisational Fabric](https://explore.psychsafety.com/n/the-organisational-fabric-of-psychological-safety.md)
- [Conway's Law](https://explore.psychsafety.com/n/psychological-safety-conways-law.md)
- [Queueing Theory & Slack](https://explore.psychsafety.com/n/queueing-theory-slack-and-resilience.md)
- [Mythical Man Month](https://explore.psychsafety.com/n/psychological-safety-66-the-mythical-man-month.md)