Interesting look at some MMOD damage on the ISS from early 2008 missions...http://www.orbitaldebris.jsc.nasa.gov/newsletter/pdfs/ODQNv12i3.pdf...estimated crater diameter of 1.78 ╠0.25 mm. The approximate crater depth was 1.27 ╠ 0.76 mm and the crater lip height was estimated to be 0.25 ╠ 0.13 mm. Since the density of the impacting micrometeoroid (MM) or orbital debris (OD) particle is not known, a diameter of approximately 0.7 mm was calculated assuming the impactor was aluminum. The damage site has been flagged so that future EVA traffic will not contact the area; avoiding the potential for cuts to EVA crewmember gloves...