Set wordWrap and variableRowHeight
<?xml version="1.0"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"> <mx:List variableRowHeight="true" wordWrap="true" width="220" height="200"> <mx:dataProvider> <mx:String>A</mx:String> <mx:String>B</mx:String> <mx:String>C</mx:String> </mx:dataProvider> </mx:List> </mx:Application>