The image demonstrates the issue you're seeing, but it doesn't do anything to help solve your riddle. It also appears that the screenshot is of the build screen that uses a substantially different CSS package than the front end. Do you know how to view CSS?  Sizing issues with images boil down to one or both of two things: image size/type, and/or CSS conflicts. I'd start with the CSS assuming the images are able to be displayed at your expected scale. Use your browser's inspection tool to identify the CSS controlling the display. It's possible your WordPress theme or another plugin's code is overriding Formidable's. Plugins load before themes in WordPress. CSS is a LIFO operation. You're the only one that can troubleshoot this problem, unless you want to pay a developer to share your screen with you to troubleshoot the issue. If hiring a developer is an option you'd consider, please visit https://formidable-masterminds.com/developers-directory/ to find someone in your price range and proximity.