Images used in New Guideline/Featured Topic widgets should be between 400 and 550px wide, and between 150 and 300px tall. Images should be roughly horizontal in ratio. The more content a widget has, the taller the image should be.
New tags should be placed right after the opening div tag of the widget.
<img alt="New Tag" class="new-tag" src="http://www-dvm.acponline.org/sites/default/files/images/cme-moc/online-learning-center/landing-page/new-tag.png">