sqlplus...automatically setting a column width?

I have some really wide varchar columns, but the data is not very long. Is there a way to automatically combine these two statements, to set the column width to the width of the longest string?

SQL> select max(length(x2)) from foo;

MAX(LENGTH(X2))

             32

SQL> column x2 format a32

Many TIA!
Mark

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Mark Harrison
Pixar Animation Studios