Having probs with radix Sort for strings

I am creating a method that does radix sort for string values. I think I need to know the maximum value for strings to do this, and I have no Idea what that would be
[179 byte] By [PhilGIlman] at [2007-9-26 1:33:32]
# 1
As in the maximum size of a string?Do you mean characters or actual byte size?
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