A common question for beginner and intermediate-level squads is what does 'good' look like when creating an Epic. This usually includes some sort of quantifiable measure around how large said Epic shoudl be.
Rather than trying to look externally for a 'best practice' solution, we should instead look internally. By collecting every Epic, and the number of child User Stories beneath them, and tallying them up into a histogram we can see what a 'typical' Epic has looked like up until now. This should in turn spark questions around the characteristics of those Epics, namely: