Since the Q3 2010
release of Telerik RadControls, grid columns now support the "resize to fit" functionality. Double-clicking the resize handle or choosing 'Best Fit' from the header context menu will have the column automatically resized to fit the widest cell content without wrapping. To enable best fit resizing:
ClientSettings -> Resizing -> AllowResizeToFit = true/false
Please review this online example
and let us know if further assistance is needed.
the Telerik team