This plugin adds support for table column resizing with your mouse. Hover your mouse over the column border to see the cursor change to indicate that the column can be resized. Click and drag your mouse to set the desired column width.
Note: Do not confuse it with the native browser resize tools that are available in Firefox and Internet Explorer.
This plugin complements the Table plugin which provides basic table operations.
This is an official plugin provided and supported by CKEditor developers.