How to make a multiplayer fps map?

What dimensions do you reccomend? It’s an archery fps and players spawn on sides of a kingdom and then battle it out.

English Longbows can reach up to about 370 meters. So maybe that long so really awesome shots can happen against tiny targets in the distance.

Width? Dunno a square or maybe half that.

Just play around with it. Make a size, test it. Try another, test it. Try one you would NEVER try, even for the lolz, test it. You will eventually find the size you need.