https://www.thedigitalfeed.co.uk/grap...-nurbs-to-maya

here's a guide on how to convert between rhino and maya using iges. I found it quite usefull when I had to do it. I remember the iges files coming into maya really big as well. If I remember correctly you had to set their scale to .1 or .01 and they would fit in the scene nicely.

hope it helps