@thepemberleycreative Hey there! So you can add something called "Inline CSS" which is basically just a little style to your line of code.
Add something like this:
<a href="https://devotedcolumbus.com/wedding-directory/602/">
<img src="https://devotedcolumbus.com/badge/602/" alt="View our listing on Devoted Columbus" width="15%" height="auto">
</a>
You can play around with using a percentage or a pixel (width="50px") till you get the desired result.