I am using 3ds max 7 to make a part that needs to be a particular size. I have units set up in millimeters. When I export as VRML97 it says my model is too big and when I export stereolitho (STL) it says my model is too small. The actuall size in mm is roughly a cylindrical 10mm in diameter by 23mm high. I have attached the max file in case that helps.
Vrml is in meters, max-> vrml does not take this into account. Try setting max to meters and scaling the model to 1/1000 before exporting to vrml (yes it will look tiny in max)