[Stiglr]

As for scaling the entire model, you'll have to find out what Unity "sees" as units. It's been my experience that many games use METERS as length units.... but your target game engine may differ.

If you can't find that out, you may have to find an item already imported that you know the size of, and import your model into the environment right next to it. That should make it clear if there's a unit disparity. If Unity uses "feet" and you use meters, you'll be able to see that your object is 3x too large or small, when it's right next to an object like a character, which is likely to be about 6 feet or close to 2 meters tall.