Those are favicons.
You can easily create one by using an icon editor. Maybe someone can tell you of one to use.
Once you create it, you upload it to your host, and then reference it in the head section of your HTML as:
Code:
<link href=[Icon location] rel='shortcut icon' type='image/x-icon'/>
<link href=[Icon location] rel='icon' type='image/x-icon'/>