The distance between each tick mark is 400nm (= 0.0004mm, or 1/2500th of a millimeter).

A veil comprised of bundles of cytoskeletal filaments lies atop the nucleus of a detergent-extracted CHO cell.  While these fibers have a structural purpose, they are also vital to numerous reactions and cellular events- they continually form, dissolve, then reemerge- they are anything but static.