I want a div to get an inline style of the image it wraps around.
Pen here: http://codepen.io/stevenmorgan94/pen/xuEwm
HTML
<div class="box">
<img src="http://placehold.it/250x150" />
</div>
JS
var img = $(".box > img");
$(".box").css({width:img.width(), height:img.height()});
So jquery get image dimensions, add inline style to .box with the width and height
jonathan didn't get it right. His solution not about what was asked. Correct one is
var img = $(".box > img");
$(".box").css({width:img.width(), height:img.height()});