Using styles in iframe

link to your site?

It’s right there in the post. Here it is again:

https://www.marshalls.org/tmtools/awards_recent.cgi?d=57&m=12&v2

This is a page I developed specifically for this purpose.

Sorry, but i can’t see it. I’m changing the font-size attribute and it works fine. I changed font-family, it’s working.
And that page is not running on wordpress?

The page I’m pulling from is a very simple plain html page, minimal header plus a few lines of text.
Is there a mistake in the way I coded the style option above?

no, i would not use in-line style if possible, but there is nothing wrong with it. Just change font-size to 22px and you will see the difference