You can set the new width of the column using two methods – setColProp and setGridWidth.

Here is example of setting new width of the column amount:

$(#mygrid).jqGrid('setColProp','amount',{width:new_width});



var gw = $(#mygrid).jqGrid('getGridParam','width');



$(#mygrid).jqGrid('setGridWidth',gw);

P.S. Note that in order to work this a shrinkToFit should be true, or you should call setGridWidth with second parameter true