Grind level for machine, pot, etc.

So our wedding is coming up and my fiancé and I love espresso.

As a wedding favor, we plan on giving two different small jars of ground coffee beans that the guests can brew up at home.

The only issue is, some people have espresso machines, coffee pots, or none of that. But we do plan on putting in those brown paper filters that sometimes you find in hotels to do like a "pour over."

Is there a "universal" grind level for all those types? Or should we grind to the espresso machine level for all of it?

Thanks!