Icon2ImageLite batch creates images from Finder icons.
BSEditor: Icon2ImageLite is a utility for creating image thumbnails of file, folder and disk icons in various image formats, in Batch.

This functionality is available as a contextual menu in the Finder. An accompanying system preference pane enables you to specify the sizes of generated images, in a range from 16 to 128 Pixels square.

you can free download Icon2ImageLite 1.2.7 now.