Only a handful of supernovae can be studied with milliarcsecondresolution using the VLBI technique. However, such rare studieshave permitted in various cases to estimate expansiondecelerations and to obtain information on supernova ejecta andcircumstellar media, as well as on the structure of the emittingregion. We review results on high resolution observations of thenearby radio supernovae: SN 1979C, SN 1986J, SN 1987A, andSN 1993J. For completeness, we also review the results on thesupernova remnants in M 82.