Set window label width
<html> <head> <title>Hello World Window</title> <link rel="stylesheet" type="text/css" href="ext-3.0.0/resources/css/ext-all.css" /> <script type="text/javascript" src="ext-3.0.0/adapter/ext/ext-base.js"></script> <script type="text/javascript" src="ext-3.0.0/ext-all.js"></script> </head> <body> <script type="text/javascript"> Ext.onReady(function() { var myWin = new Ext.Window({ height : 220, width : 230, bodyStyle : 'padding: 5px', layout : 'form', labelWidth : 50, defaultType : 'field', items : [ { fieldLabel : 'Name', width : 110 }, { fieldLabel : 'Age', width : 25 } ] }); myWin.show(); }); </script> <div id='div1'>asdf</div> </body> </html>