I decided to do a re-toplogy in zbrush 3.2. I exported my original model from zbrush 4. Once I was done with the re-toplogy, I exported my model to maya and that is where the problems began. My model was smaller then it was before I exported and re-topologized it. I had no problem rescaling it in maya but I need to be able to rescale it in zbrush due to certain layers I have existing in zbrush. I’ve been looking in zbrush trying to find some rescale information that I can compare with my original and the new model but no luck.
I don’t know if this will help you or not, but this is the only area that I know of that will give you size information.

