Hi Sarabeth. Thanks for the screenshot.
As you said, it’s likely a theme issue.
This CSS code might be helpful:
body.post-type-archive-tribe_events.events-list .tribe-events-event-image {
width: 30%;
}
It could probably be improved upon, but I believe it’ll at least make things better than they are now.
You can add custom CSS code via your child theme’s style.css file or via a plugin like Simple Custom CSS or, my favorite, Jetpack. Jetpack supports regular CSS and the LESS and Sass pre-processors.
If you’re not a CSS expert, Jetpack’s Custom Design reference may prove helpful.
Please let me know how it goes for you.