SO fiddle

Test Fiddle mainly for SO Questions

by Nick Craver

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.4/themes/overcast/jquery-ui.css">
<img class="icon" src="http://dummyimage.com/100x100/000/fff&text=Drag+Me!" style="height: 50px; width: 50px;" />

JavaScript

$(".icon").draggable({
    start: function() {
        $(this).height(100).width(100);
    },
    stop: function() {
        $(this).height(50).width(50);        
    }
});