We use a Fibonacci point scale that works like this:
- 0 Points - Nothing task, five minutes or so.
- 1 Point - No more than 1 effort hour
- 2 Points - No more than 4 effort hours
- 3 Points - No more than 8 effort hours
- 5 Points - No more than 16 effort hours
- 8 Points - The story/task is too large and should be broken up into measurable tasks.