3d models-boundry vector

If I bring in a 3d model from say vectorart3d, is there a tool in rhino to put a boundry around the model?

Not sure exactly what kind of model is produced by vectorart3d, but it looks like it might be a mesh model… Also not sure what you mean by “boundary”… Rhino can extract a number of different things from a mesh, such as its bounding box, an outline seen from Top (or other) view, edges connected under certain conditions, etc. Can you post an image or model of what you what you are trying to achieve?