Experimental studies on nuclear sizes and related topics are reviewed. The
recent development of radioactive nuclear beams has enabled us to study the
nuclear sizes of unstable nuclei. The nuclear sizes for unstable nuclei, w
hich are deduced by the interaction cross sections and reaction cross secti
ons, are mainly reviewed. From a theoretical view point, a Glauber-model an
alysis is important to deduce nuclear sizes. Other related topics, such as
halo and skin from a nuclear size point of view are also discussed. (C) 200
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