Hi @hostawesome the sizing option should be what’s used in the CSS that it adds to the feed. If it’s different, especially 50% exactly, then my guess would be there is an image optimization plugin trying to adjust for Retina or High-DPI displays etc.
If you can share the feed URL, that might help, or try deactivating image plugins one at a time (or all at once on a staging site – recommended), and see if it can be resolved that way. It could also be the theme doing it, activating a different theme on a staging site might help.
Happy to help troubleshoot more, I don’t think we’ve seen this issue with any other sites, so it must be something unique to your site.