A　method　is　developed　to　size　the　particles　of　contaminants　in　insulation　of　HV　crosslinked　polyethylene　cable　by　using　a　Fraunhofer　far-field　in-line　holographic　technique　with　no　need　to　cut　the　insulation　into　thin　slices.　The　maximum　thickness　of　the　sample　is　4.0　cm,　when　a　resolution　of　50-mu-m　is　obtained.　The　accuracy　of　measurement　is　approximately　10%　for　particles　＞　20-mu-m　diameter.