1x1.gif 		= 37 bytes! 	transparent background

useful for lazy loading! any png image would be larger!

1x1.gif
<img width="38" height="24" class="lazy" data-src="image.jpg" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" alt="...">