This clutch is 5 inches square with a buttoned flap, for secure storage for those little items you may have!
There is only one size available, but if you want to do the math, you can make your granny square larger to make the clutch larger.
Gauge is not needed in this pattern.
Specific yardage is not needed because the granny squares do not take a lot of yarn.
You can use 1-4 colors in this project.