How i can do unit setup in wings so i can set the metric unit to meters?

[Nova]

Wings3D to Unity (Game Engine) is 1:1, where 1WU (Wings Unit) is 1UU (Unity Unit). This works if you set your exporters to 1, and Unity's import scale to 1 as well.

So as Micheus mentions, it very much depends on the import/export scales and sometimes a little experimentation is needed.