How to resize a cloth simulation?

Hello I am having trouble figuring out how to resize a cloth simulation. I made a flag with a wind force field blowing on it and I am pretty happy with the results. Now I want to move the flag and resize it to fit in a scene while keeping the simulation looking like it does now. Is this possible? If so how?

Applying As shape key is the only way I know how to do that

This Tutorial explains how to do it --> starting at 20:00 minute mark or so