The feed is mark-up? If yes, have a look in the iFrame code snippet for a height attribute which could be currently set to 600px (which is probably causing the stretching).
Adjust this to 300px.
Dealing with the surrounding DIV would mean to set a height:300px and overflow:hidden but after all I can see in the browser this is not looking really well.
View the page in the Safari Web Inspector, and see which styles are contributing to the height of that iframe. There will probably be one or more styles that are injected into the page by Twitter’s code. You should be able to create your own versions of those styles in the page head or stylesheet, and override the height with !important.
Walter
On Jun 11, 2014, at 10:18 AM, Justin Easthall wrote:
The height is 300 - heres the widget no height ref here…
You can set the height of the item in the Twitter timeline widget control panel;
If the value isn’t set then I believe it reverts to 350px high although you can simply set the height on the anchor;