300 x 200

Code:
<a href="http://fairfoodforager.com" title="Fair Food Forager">
   <img alt="Fair Food Forager" src="https://fairfoodforager.com/media/badge1-300-250.png" style="width: 300px; height: 250px;" />
</a>

Example:

728 x 90

Code:
<a href="http://fairfoodforager.com" title="Fair Food Forager">
   <img alt="Fair Food Forager" src="https://fairfoodforager.com/media/badge-728-90.png" style="width: 728px; height: 90px;" />
</a>

Example: