Adobe Illustrator / Rhinoceros Custom Object Select

I'm using both AI and Rhino. I've got a file that's got over a thousand small circles that are nested inside other curves all over the file randomly. I want to select them all and group them in either Rhino or AI. How can this be done? I'm thinking programmatically, like select_if{ 0.05cm <= a && a <= 0.10}. Of course this string of code is just pseudocode to give you the gist of what I'm after assuming there is an "under the hood" approach to graphic design vis-a-vis AI or Rhino. Happy New Year!