Getting Blender scale to correspond with Unity scale

After tooling around with Unity using only primitives for a bit, I wanted to try out importing 3D models from Blender 2.60. Unfortunately, the scale doesn't seem to cross over. The model within Blender is at a scale of 1x1x1, but when I add it to a scene in Unity (and correct the scale factor to 1), it is much larger than a 1x1x1 Unity cube primitive. In fact, if I just export the default cube model from Blender, without changing anything about it, the same problem occurs. I'm trying to port a project from XNA, and the way I'm doing it, it's important that i can have models that are precisely one Unity unit of space large. Any help appreciated!