def size_col(col)   #:nodoc:
    # Look up the cell value to see if it has been changed
    if @col_sizes[col]
      width = @col_sizes[col]

      # The relationship is different for user units less than 1.
      if width < 1
        (width *12).to_i
      else
        (width *7 +5 ).to_i
      end
    else
      64
    end
  end
def size_col(col)   #:nodoc:
    # Look up the cell value to see if it has been changed
    if @col_sizes[col]
      width = @col_sizes[col]

      # The relationship is different for user units less than 1.
      if width < 1
        (width *12).to_i
      else
        (width *7 +5 ).to_i
      end
    else
      64
    end
  end
Convert the width of a cell from user's units to pixels. Excel rounds the
 column width to the nearest pixel. If the width hasn't been set by the user
 we use the default value. If the column is hidden we use a value of zero.